feat(minifier): constant evaluate .toLowerCase().startsWith('prod');

[Boshen]

For the popular library https://github.com/benmccann/esm-env/blob/esm-env%401.2.2/packages/esm-env/dev-fallback.js

const node_env = globalThis.process?.env?.NODE_ENV;
export default node_env && !node_env.toLowerCase().startsWith('prod');

If define plugin changes node_env to production:

const node_env = 'production';
export default node_env && !node_env.toLowerCase().startsWith('prod');

yields

const node_env = 'production';
export default !1;

closes #11978

[Boshen]

• feat(minifier): constant evaluate .toLowerCase().startsWith('prod'); #12027 👈 (View in Graphite)
• main

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #12027 will improve performances by 29.89%

_{Comparing 07-02-feat_minifier_constant_evaluate_.tolowercase_.startswith_prod_ (b44386e) with main (619ba2e)}

Summary

⚡ 1 improvements
✅ 37 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	mangler[cal.com.tsx]	3.5 ms	2.7 ms	+29.89%

[graphite-app]

Merge activity

• Jul 2, 8:08 AM UTC: Boshen added this pull request to the Graphite merge queue.
• Jul 2, 8:16 AM UTC: Merged by the Graphite merge queue.