experiment(compiler): Add experimental SWC compiler #10598
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araujobarret
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Jul 26, 2022
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The speed improvement is incredible and my Mac fan thanks you also! Plus no hacks added 👏
AlicanAkyuz
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really looking forward to having this experiment on main 🍾
rquartararo
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Very nice! When testing this locally I’m seeing significant time savings with yarn build and yarn jest => down from 36s to 16s for yarn build and 20s to 16s for yarn jest. 🎉
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Awesome y'all. I need to fix a few tests but once that's done we can get this into |
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@araujobarret - this surprised me too 😄. Not many hacks, but it was quite hard to find how all the pieces fit together since there are no docs. I need to open a PR to the SWC repo giving an example. |
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My results:
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anandaroop
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* test: extract RTL-based test helpers for artwork filters * refactor: convert SizeFilter spec to use new helpers * refactor: convert KeywordFilter spec to use new helpers * test: un-pend KeywordFilter specs Follow up to #10598
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The type of this PR is: Experiment
Description
Similar to Next.js, this PR updates force to use the Rust-based SWC compiler for compilation performance. Still need to run the numbers a bit more and compare against a few things as the results so far are milder than I'd expect. However, that said, everything is just about working! Force compiles and things run as one would expect.
Given the bleeding-edge nature of this work, the time savings need to be substantial enough en-masse to justify moving away from Babel. That Next.js is using it as its main compiler is promising, though.
Update (8/5/2022):
Turning this flag on by default, which should apply to both tests and local development. To opt-out, set this flag in your
.env:A handful of tests (~12) were disabled in this commit and flagged with a comment:
Many of these tests were anomalous; we should go through and resolve but not hold up the performance wins in this PR in the meantime.
Also note that SWC compilation is not enabled in prod; this is only a dev-time DX / CI test runner performance improvement.
Changes:
@swc/jestfor compiling Jest tests with SWC@swc/plugin-relayfor compilingrelaygraphql tags@swc/plugin-styled-componentsfor extracting styled-components style tags for SSR renderingHave also added a new CI job (
test-swc) so that we can compare the old against the new)Issues:
Some Test Commands:
EXPERIMENTAL_SWC_COMPILER=true yarn start, then make changes here and there and resaveEXPERIMENTAL_SWC_COMPILER=true yarn build:client:devEXPERIMENTAL_SWC_COMPILER=true yarn jest Apps/AuctionEXPERIMENTAL_SWC_COMPILER=false yarn startEXPERIMENTAL_SWC_COMPILER=false yarn build:client:devEXPERIMENTAL_SWC_COMPILER=false yarn jest Apps/AuctionInitial Results:
yarn jest Apps/Auction: 35s babel, 18s SWC. With cache 13syarn build:client:dev: 75s babel, 38s SWC. With cache 12s