Tuning Ruby's Global Method Cache

T1Covered by 1 source · first reported by Stripe / Shopify Eng / Netflix TechBlog / Dropbox Tech / Slack Eng / Spotify Eng at 21 Jan 2015, 15:52 UTC

I was recently profiling a production Shopify application server using perf and noticed a fair amount of time being spent in a particular function, st_lookup, which is used by Ruby’s MRI implementation for hash table lookups: Hash tables are used all over MRI, and not just for the Hash object…

Sources

• T1Tuning Ruby's Global Method CacheStripe / Shopify Eng / Netflix TechBlog / Dropbox Tech / Slack Eng / Spotify Eng21 Jan 2015, 15:52