Miscellaneous small optimizations#6380
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headius merged 6 commits intojruby:masterfrom Sep 1, 2020
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* Capture field in locals whenever possible to avoid repeated reads and concurrent modifications. * Override makeShared to return specialized instances, avoiding boxing of values into an array. * Add specialized logic for collect to return specialized instances. * Simplify class-based isBuiltin by allowing that case in CachingCallSite.
* Avoid re-reading some fields. * Make hash final in entry so it can be optimized by "truly final" JITs. When rehashing, if hash changes (very rare) new entries will be created.
This avoids it logging indirect binding over and over again.
Size needs to be reflected during iteration. Also perform this check during two-elt array collect and add test for that case.
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