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Revert flow test breakup#695

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simonmar wants to merge 2 commits intofacebookincubator:mainfrom
simonmar:revert-flow
Open

Revert flow test breakup#695
simonmar wants to merge 2 commits intofacebookincubator:mainfrom
simonmar:revert-flow

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@simonmar
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@simonmar simonmar commented Feb 11, 2026

As far as I can tell it's not necessary to break up this test, mainly putting up this PR to have the conversation :)

$ cabal run glass-regression-flow
...
All 101 tests passed (4.15s)

Perhaps some issue with the Meta test framework or something? At a guess, I imagine the framework is running each of the 101 tests separately, which results in building the test DB 101 times. If that's the problem, just treat it as a single test. (I remember there was some discussion about supporting "bundled" tests or something like that which was designed for this use case, but AFAIK it was never finished).

@meta-cla meta-cla bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Feb 11, 2026
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netlify bot commented Feb 11, 2026

Deploy Preview for fb-oss-glean canceled.

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meta-codesync bot commented Feb 11, 2026

@aahanaggarwal has imported this pull request. If you are a Meta employee, you can view this in D92956010.

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phlalx commented Feb 11, 2026

Basically buck run fbcode//glean/glass/test/regression:flow is ooming our conveyors. It wasn't clear how to fix it without splitting the test, or why it was broken. I'm reverting my initial revert diff and will try again, based on your observation that it is fast in the OSS CI.

meta-codesync bot pushed a commit that referenced this pull request Feb 11, 2026
Summary:
Original commit changeset: 3d64518aa5bb

Original Phabricator Diff: D91738264

Simon Marlow is arguing [here](#695) that this test should be fast, and that splitting it isn't the right approach.  It's only 4.5 seconds in the OSS CI so there's another issue that makes it slow with buck.

Reviewed By: aahanaggarwal

Differential Revision: D92957270

fbshipit-source-id: e143018535ba0ae15b07d0a564093dd2c47606e1
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