On a session basis browser caches are effective but on a session to session basis it’s likely the content will get evicted as resources from other sites gets cached - there’s an oldish Facebook study where they placed an image in the cache and after 12hrs it had been evicted for 50% of visitors
Service Workers offer more controls over cache lifetime, and in Chromium (at least) JS gets stored in an intermediate form (which reduces the re-compile overhead on reuse)
Service Workers offer more controls over cache lifetime, and in Chromium (at least) JS gets stored in an intermediate form (which reduces the re-compile overhead on reuse)