Defer schema validation to improve test performance

Many modules export an `ajvCompiledJsonSchemaValidator(...)`, which
incurs the `ajv` schema compilation at module-import-time.
Many tests depend on these modules transitively, but don't exercise the
compiled schema - so, this compilation time is wasted.

On my machine, with an example test (airbrake/src/index.test.ts) I'm
seeing the following numbers (n=10):

Before: 6005.1ms
After: 5807.8ms
Benefit: 197.3ms (~3.3%)

Weirdly, the NodeJS profiler was saying that schema compilation was
taking ~2000ms, but that is likely due to the inaccuracy of the
sampling.

Signed-off-by: Mitchell Hentges <mhentges@spotify.com>

This commit is contained in:

Mitchell Hentges

2022-09-21 16:35:56 +02:00

parent c3936bd995

commit 6f3b8d0962

2 changed files with 9 additions and 1 deletions

.changeset/bright-rules-shout.md

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 '@backstage/catalog-model': patch
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 Defer `ajv` compilation of schema validators to improve module-import performance