feature(gatsby): Add experiment to run source plugins in parallel #28214
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| if (stopQueuedApiRuns) { | ||
| return null | ||
| } | ||
| let apiRunPromiseOptions = {} |
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The PR has a lot less change than it appears with all the whitespace changes — see it with those removed https://github.com/gatsbyjs/gatsby/pull/28214/files?diff=unified&w=1
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Co-authored-by: Vladimir Razuvaev <[email protected]>
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…tsbyjs#28214) * feature(gatsby): Add experiment to run source plugins in parallel * Add concurrency limit (20) * remove debugging code * Add flag support * Update packages/gatsby/src/utils/api-runner-node.js Co-authored-by: Vladimir Razuvaev <[email protected]> Co-authored-by: Vladimir Razuvaev <[email protected]>
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This speeds up cold sourcing for gatsbyjs.com (which has 4 external sources) from 78s -> 45s or a 42% improvement.
Gatsby runs APIs sequentially. That's normally what we want as running many APIs is CPU bound. But sourcing is almost entirely bounded by the speed of the external APIs so we save quite a bit of time for sites with multiple source plugins by sourcing in parallel.
There's a chance someone is depending on the serial behavior of API running so we'd need to wait for Gatsby v3 to enable it for everyone.
In the meantime you can enable it by adding the
PARALLEL_SOURCINGflag to your gatsby-config.js or running gatsby with the env variableGATSBY_EXPERIMENTAL_PARALLEL_SOURCING=true