Jake Bailey @andhaveaniceday Twitter profile

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Jake Bailey

28 days

TypeScript 5.7 will load 2.5x faster than TypeScript 5.6 when run in Node 22+, thanks to @JoyeeCheung 's work to provide an offical API for V8 compile caching. That's 60% less time waiting for tsc/tsserver to actually start doing work. PR:

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Jake Bailey

@andhaveaniceday

2 years

After months of work (and years before me!), I've just sent the PR that converts TypeScript itself to modules. The compiler is 10-25% faster, the package is 43% smaller, and more.

Convert the codebase to modules by jakebailey · Pull Request #51387 · microsoft/TypeScript

This is it; the PR that converts the TypeScript repo from namespaces to modules. TL;DR: The TypeScript compiler is now implemented internally with modules, not namespaces. The compiler is now 10-25...

github.com

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Jake Bailey

@andhaveaniceday

7 months

TypeScript 5.5 will be 30%+ smaller than TS 5.4!

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Jake Bailey

@andhaveaniceday

1 year

TS 5.3 will be 20% smaller than TS 5.2

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Jake Bailey

@andhaveaniceday

2 years

The PR has been merged! We are modules!!!

Jake Bailey

@andhaveaniceday

2 years

After months of work (and years before me!), I've just sent the PR that converts TypeScript itself to modules. The compiler is 10-25% faster, the package is 43% smaller, and more.

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Jake Bailey

@andhaveaniceday

8 months

Don't mind me, just saving the ecosystem nearly a petabyte in data transfer a month

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Jake Bailey

@andhaveaniceday

2 years

More fun perf stuff; I'm working on converting DefinitelyTyped to a true monorepo and found a couple of perf wins in pnpm that makes `pnpm install` all of DT go from from 1 minute to 13 seconds! (I have more to send but this is a great start!)

pnpm spends all of its time building a graph, resolving paths in repo with 8000+ packages (Defini...

pnpm version: 7.30.0 Code to reproduce the issue: This is going to be ridiculous (sorry), but, I'm currently working on converting DefinitelyTyped to a monorepo, and I'm testing pnpm as an ...

github.com

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Jake Bailey

@andhaveaniceday

2 years

Has anyone looked into optimizing Node's semver library? It turns out that 30%+ of pnpm's install time is spent comparing versions 😅

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Jake Bailey

@andhaveaniceday

2 years

TypeScript package maintainers, please, please, please, do not ship your TypeScript source and tsconfig in your package, I'm begging you. Please. Don't do it.

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Jake Bailey

@andhaveaniceday

2 years

@RReverser JS doesn't have named parameters either, so in the TypeScript compiler repo we stick a comment on calls like these. Last week I submitted an upgade to our lint rule which lets you auto fix them; so much saved time and brainpower.

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Jake Bailey

@andhaveaniceday

6 months

After many import rewrites and a couple of tweaks, it looks like it may be possible for TypeScript to go ESM, including the public API, without breaking CJS once --experimental-require-module is unflagged (assuming makes progress). Very very very cool.

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Jake Bailey

@andhaveaniceday

1 year

Now that the nightly is out, I get to pull the numbers from packagephobia and yay! In 4.9, I deleted some files that had accidentally been included in the package since 3.7 (!) In 5.0,✨modules✨ In 5.3, tsserverlibrary.js replaces typescript.js. I hope there's more, somehow...

Jake Bailey

@andhaveaniceday

1 year

TS 5.3 will be 20% smaller than TS 5.2

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Jake Bailey

@andhaveaniceday

7 months

TS 5.5 is poised to be one of the best of all time

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Jake Bailey

@andhaveaniceday

1 year

It hasn't happened yet (merging today!!!), but I wrote a big ol blog post on the giant migration of DefinitelyTyped to a @pnpmjs monorepo! I am super excited for this. Again thank you @atcb @sanders_n @ZoltanKochan and everyone else.

DefinitelyTyped is a monorepo!

Yes, it is! But for real this time!

jakebailey.dev

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Jake Bailey

@andhaveaniceday

11 months

@jarredsumner You could read node_version.h, which contains info like: #define NODE_MAJOR_VERSION 20 #define NODE_MINOR_VERSION 9 #define NODE_PATCH_VERSION 0

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Jake Bailey

@andhaveaniceday

1 year

Oh baby it happened

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Jake Bailey

@andhaveaniceday

3 years

Today was my last day (officially) working on Python; it's sad to go, but after a two week break, I'll be working on the TypeScript compiler team! 🥳 I truly appreciate everything that's brought me where I am today.

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Jake Bailey

@andhaveaniceday

7 months

Okay everyone's asking what I'm so excited about, and it's because I had just gotten the final perf numbers for a PR, which applies @rbuckton 's monomorphization work to the public API and tsserver.

Jake Bailey

@andhaveaniceday

7 months

TS 5.5 is poised to be one of the best of all time

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Jake Bailey

@andhaveaniceday

1 year

Been working on a little project and I've just published it; "every-ts" is a utility that can build any version/commit of TypeScript, ever. It wraps git so you can bisect problems down to when they actually changed, without knowing how to build TypeScript.

GitHub - jakebailey/every-ts: A utility to build and bisect any version of TypeScript

A utility to build and bisect any version of TypeScript - jakebailey/every-ts

github.com

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Jake Bailey

@andhaveaniceday

6 months

I feel the need to revise my last tweet TS 5.5 may very well be _the greatest of all time_

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Jake Bailey

@andhaveaniceday

2 years

More late-night-ish perf fun; this time, a 700MB (~30%) reduction in pnpm's max memory usage on the DT monorepo by ensuring that a bunch of limiters (which serialize concurrent accesses to files) get GC'd. Yay profiling!, Rather, snapshotting!

perf(npm-resolver): reduce max memory usage by jakebailey · Pull Request #6296 · pnpm/pnpm

I was doing some memory profiling to understand why pnpm was OOMing on my laptop. A heap snapshot showed that about 500 MB of the memory usage of pnpm is instances of Limiter (and the objects they ...

github.com

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Jake Bailey

@andhaveaniceday

11 months

finally, the graph is real, no mspaint needed

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Jake Bailey

@andhaveaniceday

1 year

@mattpocockuk rm

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Jake Bailey

@andhaveaniceday

1 year

The esbuild playground is now fully powered by WASI 🎉 Everything should work, including --outdir, stdout, even using package.json or tsconfigs. Here's a fun one showing ESM splitting:

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Jake Bailey

@andhaveaniceday

7 months

This continues the downward trend, and I'm really happy about it.

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Jake Bailey

@andhaveaniceday

2 years

Big thanks to everyone who brought us here, especially @WesleyWigham @elibarzilay @evanwallace @DavidSherret !

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Jake Bailey

@andhaveaniceday

2 years

Daniel and me: here's 6000 word article on one of the biggest refactors in the TS project's history. 50% of commenters: HAVE YA HEARD OF TABS???

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Jake Bailey

@andhaveaniceday

2 years

I need to clarify, this for TS 5.0, not TS 4.9; we're abusing (using?) the semver major bump for these sorts of big changes.

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Jake Bailey

@andhaveaniceday

1 year

People asked for custom transformer plugins in tsc, so... wish granted? (Please, if you have feedback please give it!)

A minimal custom transformer plugin proposal · Issue #54276 · microsoft/TypeScript

In the TypeScript compiler, we have the concept of a "transformer". A transformer is a function which "transforms" one AST to another. TypeScript ships many such transforms, inc...

github.com

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Jake Bailey

@andhaveaniceday

2 years

31% faster pnpm install on the DT monorepo thanks to @vinii_joga10 ! This PR speeds up the "weird helper" I mentioned in my previous thread; now replaced with something less allocate-y by reusing identical options objects. Yes, allocations matter in JS!

fix: faster parse options by H4ad · Pull Request #535 · npm/node-semver

The performance of parse-options before: includePrerelease x 12,935,785 ops/sec ±3.66% (80 runs sampled) includePrerelease + loose x 6,915,009 ops/sec ±1.54% (85 runs sampled) includePrerelease + l...

github.com

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Jake Bailey

@andhaveaniceday

1 year

It's a bit unceremonious, but yesterday marked my 5 years at Microsoft! I've had the pleasure to work with so many wonderful and supportive people on projects that always manage to give me joy. Thank you all for making me who I am today! <3

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Jake Bailey

@andhaveaniceday

2 years

So, for now, I've sent a PR which adds a little bit of caching of semver objects to the hot part of pnpm; this gets most of the speedup (~3min -> ~2min, +/- variance). But, I think it'd be definitely cool to try and optimize semver or rethink its API to help everyone out.

Jake Bailey

@andhaveaniceday

2 years

Has anyone looked into optimizing Node's semver library? It turns out that 30%+ of pnpm's install time is spent comparing versions 😅

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Jake Bailey

@andhaveaniceday

8 months

Now that's what I call a PR

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Jake Bailey

@andhaveaniceday

1 year

Big shoutout to @z_bodya for all of their recent @pnpmjs perf PRs which feature nice pprof profile screenshots; glad pprof-it is still working out 🎉

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Jake Bailey

@andhaveaniceday

6 months

Thanks to @JoyeeCheung , there's now a PR which provides a way to sync/conditionally grab Node's builtins from ESM. Polyfilling that into Node 22 got me far enough to get our CLI, API, and test suite passing!!! So, here's a draft PR to make TS ESM-only.

Make TypeScript itself ESM-only, made possible by require(ESM) by jakebailey · Pull Request #58419...

nodejs/node#51977 (behind --experimental-require-module in Node 22) enables Node to require ESM so long as that ESM does not make use of top-level await. TypeScript would only need top-level await ...

github.com

Jake Bailey

@andhaveaniceday

6 months

After many import rewrites and a couple of tweaks, it looks like it may be possible for TypeScript to go ESM, including the public API, without breaking CJS once --experimental-require-module is unflagged (assuming makes progress). Very very very cool.

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Jake Bailey

@andhaveaniceday

6 months

This is a big one!!!!

TypeScript

@typescript

6 months

Announcing TypeScript 5.5 Beta! 📣 Now with type predicate inference, more type narrowing, an @‍import tag for JSDoc, the --isolatedDeclarations flag, performance & reliability improvements, and much more!

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Jake Bailey

@andhaveaniceday

2 years

Alright, making good on my promise to write some sort of blog post about this. Hope you enjoy!

Speeding up pnpm

DefinitelyTyped contains over 8000 packages. What could go wrong?

jakebailey.dev

Jake Bailey

@andhaveaniceday

2 years

More fun perf stuff; I'm working on converting DefinitelyTyped to a true monorepo and found a couple of perf wins in pnpm that makes `pnpm install` all of DT go from from 1 minute to 13 seconds! (I have more to send but this is a great start!)

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Jake Bailey

@andhaveaniceday

1 year

oh my god people stop specifing a maximum node version in your package.json's engines field, it's like 99% likely that your package is going to work fine in the next verison of node, you're just spamming everyone who wants to use a faster, more secure version

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Jake Bailey

@andhaveaniceday

2 years

Boom! Got it! No more graph sequencer 😃 Yes, it was just another instance of "accidenally quadradic".

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Jake Bailey

@andhaveaniceday

2 years

So, TypeScript has had a small epidemic of crashes (both my fault 😅), both were very annoying to find and minimize. I added a fast-check unittest to fuzz the parser and in seconds it found the same bug. @ndubien

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Jake Bailey

@andhaveaniceday

2 years

Ever wanted way too much info about how we converted TypeScript to modules?

TypeScript

@typescript

2 years

Want to hear about our refactoring adventures? We put together a nice short write-up (just 6,000 words) about our journey in modernizing the TypeScript codebase, and our migration to modules!

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Jake Bailey

@andhaveaniceday

6 months

isolatedDeclarations, transpileDeclaration, skipping typecheck in transpileModule (faster bundling in webpack, rollup, etc), much improved AST reuse in dts emit, syntax checked regex (hopefully), more??? This is on top of the stuff I already listed a couple weeks ago.

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Jake Bailey

@andhaveaniceday

1 year

fun fact, complaining that your favorite bug (1 of 6,000) isn't fixed yet, that you'll die before you see it fixed, etc, is not going to make the bug get fixed any faster, it's just going to make maintainers sad or, maybe that was your goal, in which case 👎

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Jake Bailey

@andhaveaniceday

2 years

Did I waste a bunch of time adding a spinner to a script I should hopefully only need to run once? Yes. Yes I did.

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Jake Bailey

@andhaveaniceday

2 years

The last quadratic behavior in pnpm (that I know of, anyway), is now squashed

perf(pkgs-graph): speed up createPkgGraph when directory specifiers are present by jakebailey ·...

This speeds up the install of "with paths" test case (https://github.com/jakebailey/DefinitelyTyped/tree/blog-pnpm-workspaces-with-paths) from 49.7s to 14s. Time spent in createPk...

github.com

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Jake Bailey

@andhaveaniceday

1 year

Next week is gonna be a fun week Soon the scourge of baseUrl, paths, and typesRoot will be purged, replaced with "how about we actually use node_modules like everyone else" (thank you @atcb and Nathan for your efforts, and of course @ZoltanKochan and contributors for pnpm)

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Jake Bailey

@andhaveaniceday

1 year

Change is Maybe I'll have the time to finally try for even more savings?

Use ESM for our executables (tsc, tsserver, typingsInstaller) · Issue #51440 · microsoft/TypeScript

Our libraries are all UMD-ish, because they can be used in Node or in the browser. I didn't change this for the module transform. However, most of our executables are CJS, as they are only inte...

github.com

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Jake Bailey

@andhaveaniceday

11 months

@ahsan_js @jarredsumner If reading a 4KB file somehow takes longer than 20ms, I'm going to quit coding

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Jake Bailey

@andhaveaniceday

2 years

@RReverser Someone's inevitably going to ask "why not an options bag?" This turns out to be faster, and the order of the parameters is also the order of the AST traversal and the guaranteed order of the properties in the object (which actually turns out to matter for perf/stability).

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Jake Bailey

@andhaveaniceday

7 months

@mattpocockuk - Perf - Package size - Type predicate inference - Removing everything deprecated in 5.0 - More???

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Jake Bailey

@andhaveaniceday

7 months

Many months later and I'm seeing so many people filing issues and including a bisect that points to specific PRs. So cool.

Jake Bailey

@andhaveaniceday

1 year

Been working on a little project and I've just published it; "every-ts" is a utility that can build any version/commit of TypeScript, ever. It wraps git so you can bisect problems down to when they actually changed, without knowing how to build TypeScript.

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Jake Bailey

@andhaveaniceday

8 months

Context:

[node] Remove ts4.8 in favor of new multi-tsconfig testing by jakebailey · Pull Request #68908 ·...

microsoft/DefinitelyTyped-tools#973 will allow DT packages to specify which tsconfigs to check at test time. This allows for multiple tsconfig settings to work, including one with DOM and one witho...

github.com

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Jake Bailey

@andhaveaniceday

2 years

What's a few hundred thousand lines between friends?

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Jake Bailey

@andhaveaniceday

2 years

My weekend perf project is a new semver library, or at least something that can be adapted into the current npm semver API. I only have the "easy" stuff done, so version parsing and comparison, but it's looking promising! Parsing is ~1.5-2.5x faster, comparison 1.5-6.5x faster.

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Jake Bailey

@andhaveaniceday

1 year

@ZoltanKochan

esbuild should move to version 1.0.0 · Issue #2544 · evanw/esbuild

Based on https://semver.org/#how-do-i-know-when-to-release-100 I feel like the API is stable enough across versions, and it's used in production in a vast number of projects, companies and pack...

github.com

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Jake Bailey

@andhaveaniceday

2 years

Okay this statement was maybe too strong. I'm not gonna pay Elon to edit it so I'll just say: - At least put your TS source into a different dir - Don't ship a tsconfig that

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Jake Bailey

@andhaveaniceday

7 months

@AndaristRake @danvdk To think that this was Dan's second PR to TypeScript, and first that touched the checker. S tier

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Jake Bailey

@andhaveaniceday

2 years

@DavidSherret Some of those gains are from targeting ES2018, but most of them are from scope lifting. The API surface is unchanged; internals are still exported as they are now (and my d.ts bundler produces a file for that, similar to the old build by disabling stripInternal).

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Jake Bailey

@andhaveaniceday

2 years

I think my tone may have been unclear; I'm genuinely curious and interested in how to make things faster, and if anyone's tried! This is totally not a dig at the library. I just like when code go brr

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Jake Bailey

@andhaveaniceday

2 years

@srsholmes It looks better if you look at individual commits, or just skip the "unindent" step. That's what we get for having all of our code nested in namespaces...

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Jake Bailey

@andhaveaniceday

2 years

Making further progress on the monorepo'd DT... Now with properly configured devDeps and such and... All new slowness 😥 @vinii_joga10 How bored are you? 😅

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Jake Bailey

@andhaveaniceday

8 months

corepack good end tweet

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Jake Bailey

@andhaveaniceday

7 months

This improvement comes from changing some of our entrypoints to use the public API rather than duplicating code. Now TS only contains 1.7 copies of the compiler, where the 0.7 is tsc.js, which is still intentionally a smaller, faster bundle.

Make tsserver and typingsInstaller thin wrappers around public API by jakebailey · Pull Request...

If you check out the tsconfigs for tsserver and typescript (previously tsserverlibrary), you'll note that they're the same! typescript is just a plain reexport for public use, meani...

github.com

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Jake Bailey

@andhaveaniceday

6 months

ty ty ty @JoyeeCheung

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Jake Bailey

@andhaveaniceday

1 year

This is super WIP, but, I just pushed up my weekend work getting esbuild to run via WASI in the browser. No more hacking up a VFS via plugins (forcing me to reimplement module resolution); now it's actually a VFS!

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Jake Bailey

@andhaveaniceday

2 years

Also, if you want to read this PR more easily, try looking at my silly gerrit clone PRs on my fork: I really, really wish GitHub would integrate a gerrit-like PR UI for stacked changes.

Make a few changes to allow all code to be loaded as one project by jakebailey · Pull Request #1 ·...

Please do not comment on this PR. Depending on how this set of PRs evolves, this PR's contents may change entirely based on the order of commits. This PR is a part of a stack: Make a few c...

github.com

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Jake Bailey

@andhaveaniceday

2 years

Ever accidentally throw an exception in the JS debug console and then get 1000 lines of stack trace because you're debugging a really deep stack frame? Well, soon, it won't do that. Sweet relief.

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Jake Bailey

@andhaveaniceday

8 months

@izs @jarredsumner IIRC you can determine it by reading the environment; there should be an entry like: `=C:=C:\some\path` Which is usually just misparsed or ignored by many standard libs. There's a Raymond Chen post for everything:

What are these strange =C: environment variables? - The Old New Thing

You won’t see them when you execute a SET command, but if you write a program that manually enumerates all the environment variables and prints them out, and if you launch it from a command prompt,...

devblogs.microsoft.com

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Jake Bailey

@andhaveaniceday

7 months

@youyuxi Every day I think that we'll eventually be free of tsconfig paths, and every day I'm disappointed

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Jake Bailey

@andhaveaniceday

2 years

I have no idea where the word "that" came from. I've already forgotten if I had a whole sentence prepared. Great brain

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Jake Bailey

@andhaveaniceday

6 months

@colinhacks This should be a lot better in 5.5, but if you still have this problem in nightly, setting "typescript.tsserver.log": "verbose", changing branches and then sending us the tsserver log would be very helpful.

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Jake Bailey

@andhaveaniceday

7 months

For tsserver, this helps pretty much universally.

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Jake Bailey

@andhaveaniceday

2 years

Naively throwing a cache on semver.satisfies reduces a fresh pnpm install of DT from 3 minutes to 2 minutes, at the cost of 200MB peak memory. Worth it? Maybe...

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Jake Bailey

@andhaveaniceday

2 years

Sweet sweet savings

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Jake Bailey

@andhaveaniceday

7 months

@OlvisGil This paper claims there's a 5x difference TypeScript and JavaScript, which indicates that its methology is fundamentally flawed and that its results cannot be trusted. TS is just JS with erasable type syntax. It's very frustrating to see this paper continue to make the rounds.

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Jake Bailey

@andhaveaniceday

3 years

My cool move of the day is wanting my charging port on the other side of my laptop, then remembering it's a @FrameworkPuter , so I move it.

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Jake Bailey

@andhaveaniceday

2 years

Prevent quadradic behavior by using Sets to look up groups by jakebailey · Pull Request #1 ·...

I recently changed my WIP DT pnpm branch to include more things in devDeps, which made this code a bottleneck. Thankfully, we can do something similar to pnpm/pnpm#6281 and avoid the quadradic look...

github.com

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Jake Bailey

@andhaveaniceday

7 months

@fabiospampinato Many projects source patch TS, users and automation report crashes with stack traces, and a few helpful parties debug TS directly from their deps. That'd all stop working or be a lot harder if minified. Bun caches big JS files, and I'm hoping for in Node

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Jake Bailey

@andhaveaniceday

7 months

And if you're using the public API to do something like tsc, i.e. check or emit, you'll get the speedup tsc got in TS 5.0. Hopefully faster ts-node, ts-loader, ts-eslint, nx, apiextractor, the works. A comparable benchmark is to force tsc to use the public API:

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Jake Bailey

@andhaveaniceday

3 years

I don't know how I missed this but it makes me really happy when people stick my pyright-action into their workflows, especially big chonkers like gym

Adds type checks via `pyright` to CI by ikamensh · Pull Request #2477 · openai/gym

Contribution towards #2452 Adds type checks via pyright - first step for having typing in gym, and two first typechecked files (version.py and logging.py). While mypy can be considered official / r...

github.com

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Jake Bailey

@andhaveaniceday

2 years

Loving vitest and its built-in benchmarking for my weekend perf obsession. It's something I sorely miss when I'm not writing Go (though I think Deno brought first-class benchmarking to JS first?). Now all I need is fuzz testing!

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Jake Bailey

@andhaveaniceday

1 year

fetching the packument of 9000 packages: no problem have fun👍 asking for the cached download count for 9000 packages: woah woah woah🙅🙅🙅🙅🙅🙅 stop that

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Jake Bailey

@andhaveaniceday

2 years

@43081j Performance; many people (including me) have asked "why isn't this a class", or "why is it so big", and it all comes down to performance. See also: TypeScript isn't the checker with this "huge closure" pattern; pyright has the same thing (though less so).

Crazy checker.ts refactor experiment (25kloc) · Issue #17861 · microsoft/TypeScript

I have made tool-assisted refactoring experiment on typeChecker. The goal is to convert checker.ts from incapsulated js scope to a class. For better extensibility and publicity (#17680). All tests ...

github.com

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Jake Bailey

@andhaveaniceday

1 year

@atcb @sindresorhus My money is on but it's a different "username that starts with s".

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Jake Bailey

@andhaveaniceday

11 months

@slicknet @JounQin @remcohaszing @karlhorky @antfu7 @geteslint Posted at .

New flat config poses challenges for DefinitelyTyped · eslint eslint · Discussion #17853

Sending this over per https://twitter.com/andhaveaniceday/status/1734628817787056253 DefinitelyTyped (https://github.com/DefinitelyTyped/DefinitelyTyped) is a monorepo with over 9000 packages. We u...

github.com

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Jake Bailey

@andhaveaniceday

2 years

@RReverser Just to really clarify, positional params can be faster, and at TS scale it can matter. But there's plenty of places that it doesn't and so we use option bags too. Option bags are definitely the better option for many reasons; don't prematurely optimize based on my commentary!

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Jake Bailey

@andhaveaniceday

7 months

To be clear this is not the _only_ reason I think 5.5 is going to be one of the best yet, loads of great stuff, including other people's perf stuff, type predicate stuff, DTS file improvements... maybe isolatedDeclarations too?

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Jake Bailey

@andhaveaniceday

1 year

@jarredsumner Obligatory And

The weird world of Windows file paths

File system paths on Windows are stranger than you might think. On any Unix-derived system, a path is an admirably simple thing: if it starts with a /, it’s a path. Not so on Windows, which serves up...

www.fileside.app

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Jake Bailey

@andhaveaniceday

6 months

ty ty ty ty ty ty ty

process: add process.getBuiltinModule(id) by joyeecheung · Pull Request #52762 · nodejs/node

process.getBuiltinModule(id) provides a way to load built-in modules in a globally available function. ES Modules that need to support other environments can use it to conditionally load a Node.js ...

github.com

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Jake Bailey

@andhaveaniceday

1 year

@thorstenball I remember when I was at Google, I had Ian Lance Taylor approve some Go I wrote for readability without any notes. That made me feel very happy, enough to take a picture of my watch (which really dates the photo)

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Jake Bailey

@andhaveaniceday

5 months

oh great this stupid site redirects to x dot com now

2

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Jake Bailey

@andhaveaniceday

2 years

GOOS=wasip1 just landed in Go, and holy moly, esbuild just works. Next step, update esbuild-playground to use this instead so I can emulate the full filesystem instead of using plugins! (Probably with ?)

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Jake Bailey

@andhaveaniceday

2 years

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Jake Bailey

@andhaveaniceday

1 year

I've spent days trying to figure out why some code I wrote wasn't working. Rewriting, rewriting, print debugging, new test cases. Never worked in the "real world". I figured out the problem. My new code wasn't running. I'm not sure if I'm more mad or disappointed. Both. Both.

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Jake Bailey

@andhaveaniceday

7 months

@ahejlsberg also has a PR like this one to monomorphize our CFA flow nodes, which also incremenetally improves performance.

Monomorphic flow nodes by ahejlsberg · Pull Request #57977 · microsoft/TypeScript

Experiment to observe the performance effects of monomorphic flow nodes.

github.com

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Jake Bailey

@andhaveaniceday

2 years

Also, this PR upstream in semver which is addressing some of the perf things I had in my profile:

perf: improving performance by H4ad · Pull Request #528 · npm/node-semver

I saw this tweet by @jakebailey, describing the time spent just parsing the options. parsing-options.js So I did a simple refactoring removing two loops from the parsing options, before: includePr...

github.com

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Jake Bailey

@andhaveaniceday

8 months

@danvdk @DavidSherret The playground technically had this as a plugin (see screenshot), but the real visual graph and ts-ast-viewer integration is awesome (I use that site so much). Great work!!

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Jake Bailey

@andhaveaniceday

5 months

@jarredsumner If my DNS isn't updated all around in like 15 minutes I'm pretty sad I often send manual cache purge requests to Google and CloudFlare and so on, continually digging the major nameservers until they're all done, so I can continue a deployment

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Jake Bailey

@andhaveaniceday

2 years

@bradzacher @tseslint I'm preparing a bunch of notes / opinions for future esbuild changes, and reading the opener to is just painful. Then I go move on to removing a DT package, only to find that the very first one in my list ships their entire repo unfiltered. aaaaaaaaaaaaaa