Optimizing Ruby’s JSON, Part 2
In the previous post, I covered my motivations for improving ruby/json’s performance, and detailed the first 4 notable optimizations applied to speed up JSON generation. If I was to cover every single optimization applied, at this rate I’d end up with a dozen parts, so I’ll try to only focus on the one that made a significant difference or used an interesting pattern. Reducing Setup Cost - Argumen
Optimizing Ruby’s JSON, Part 1
I was recently made maintainer of the json gem, and aside from fixing some old bugs, I focused quite a bit on its performance, so that it is now the fastest JSON parser and generator for Ruby on most benchmarks. Contrary to what one might think, there wasn’t any black magic or deep knowledge involved. Most of the performance patches I applied were fairly simple optimizations driven by profiling. A
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Table lookups are efficient – Daniel Lemire's blog