perf(createSelector): stop allocating dev-check bookkeeping on every call

[veksa]

The dev-mode checks live inside the hot path, and getDevModeChecksExecutionInfo builds four objects — a spread, a wrapper, and one per check — every time a selector recomputes its dependencies. Both checks default to 'once', so from the second recomputation onwards all four are allocated, read for two booleans, and thrown away.

This resolves the two frequencies in place and calls the check functions directly. getDevModeChecksExecutionInfo has no callers left, so it goes; the public DevModeChecksExecutionInfo type stays. Production is unaffected — the whole change sits inside the NODE_ENV !== 'production' guard.

One thing worth a look in review: I used hasOwnProperty rather than ??. The spread this replaces means devModeChecks: { identityFunctionCheck: undefined } silences the check — it's a present key overriding the default with a frequency that's neither 'once' nor 'always' — where ?? would fall back to the global setting and turn it back on. That edge wasn't covered, so there's a test for it now, and it does fail with ??. The common case has no overrides and reads the global directly, no hasOwnProperty call at all.

Measured with the harness from #770, dev mode (yarn bench:hot-path:dev), paired against master in one process, ns/call:

case	before	after
3 inputs, (state, props)	251.5	217.8	1.15x
1 input, (state, props)	203.7	179.4	1.14x
6 inputs, (state, props)	355.4	317.7	1.12x
same as second, argsMemoize: lruMemoize	89.9	80.7	1.11x
1 input, (state)	12.4	11.9	noise
nested (2 output selectors)	12.9	12.7	noise

Dev mode was costing 20–27% over production on the parametric cases; it's now roughly 12–20%. The last two rows are selectors called with the state alone — they hit the argument cache, so they don't recompute dependencies and there's nothing here to skip. Recomputation counts are identical throughout.

[netlify]

✅ Deploy Preview for reselect-docs canceled.

Name	Link
🔨 Latest commit	36a7dce
🔍 Latest deploy log	https://app.netlify.com/projects/reselect-docs/deploys/6a7599d0d2ad4800084729e1

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

[markerikson]

Nice! Will follow up on these as soon as I have some time. Thanks!