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refactor(core): improve handling of server bundle #10429

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merged 3 commits into from
Aug 21, 2024

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slorber
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@slorber slorber commented Aug 20, 2024

Motivation

While working on this PR, I discovered a few surprising facts so far:

  • server compilation emits file-loader assets (so, they are emitted by both server/client compilations)
  • server bundle is unexpectedly code split (chunks created in website/build/server/assets/js) and chunks were not removed from production deployments

Changes I made:

  • Move server bundle generation to website/build/server/* instead of website/build/*
  • Add a secret env variable to not delete it for inspection purposes
  • Do not emit file-loader assets in server compilation (yes we did that, but it didn't cause problems nor real perf issues)

Test Plan

CI keeps working as before

No perf regression

DOCUSAURUS_KEEP_SERVER_BUNDLE=true yarn build:website:fast works locally and keeps the website/build/server folder

Benchmark

So far it doesn't seem to affect performance much, but I'll run this again before merging

Cold cache:

hyperfine --prepare 'yarn clear:website' --runs 5 'yarn build:website:fast'

Main
Benchmark 1: yarn build:website:fast
  Time (mean ± σ):     57.626 s ±  1.238 s    [User: 126.024 s, System: 13.077 s]
  Range (min … max):   56.066 s … 59.414 s    5 runs

Feat
Benchmark 1: yarn build:website:fast
  Time (mean ± σ):     54.702 s ±  1.251 s    [User: 126.715 s, System: 12.388 s]
  Range (min … max):   53.785 s … 56.890 s    5 runs

Warm cache:

hyperfine --warmup 1 --runs 5 'yarn build:website:fast'

Main
Benchmark 1: yarn build:website:fast
  Time (mean ± σ):     12.584 s ±  0.567 s    [User: 19.326 s, System: 3.966 s]
  Range (min … max):   12.235 s … 13.581 s    5 runs

Feat
Benchmark 1: yarn build:website:fast
  Time (mean ± σ):     13.168 s ±  0.723 s    [User: 20.047 s, System: 4.027 s]
  Range (min … max):   12.564 s … 14.162 s    5 runs

Test links

https://deploy-preview-10429--docusaurus-2.netlify.app/

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⚡️ Lighthouse report for the deploy preview of this PR

URL Performance Accessibility Best Practices SEO Report
/ 🟠 61 🟢 98 🟢 96 🟢 100 Report
/docs/installation 🟠 52 🟢 97 🟢 100 🟢 100 Report
/docs/category/getting-started 🟠 75 🟢 100 🟢 100 🟠 86 Report
/blog 🟠 69 🟢 96 🟢 100 🟠 86 Report
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github-actions bot commented Aug 20, 2024

Size Change: +377 B (0%)

Total Size: 11.6 MB

ℹ️ View Unchanged
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@slorber slorber added the pr: maintenance This PR does not produce any behavior differences to end users when upgrading. label Aug 20, 2024
@slorber slorber added the Argos Add this label to run UI visual regression tests. See argos.yml GH action. label Aug 20, 2024
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@slorber slorber merged commit 97bd815 into main Aug 21, 2024
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@slorber slorber deleted the slorber/move-server-bundle-path branch August 21, 2024 15:34
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