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low_level_benchmarking

⚡️ Harness Low-Level Benchmark for Micro-Optimizations​

When you need nanosecond precision to decide between two algorithms, drop down to Ruby’s Benchmark API with GC control. By disabling garbage collection during your measurement and running high iteration counts, you can surface micro-optimizations that matter in hot code paths.

require 'benchmark'

# Disable GC to avoid pauses during measurement
gc_was_disabled = GC.disable
iterations = 500_000

Benchmark.bm(20) do |x|
  x.report("String#+:") { iterations.times { "a" + "b" } }
  x.report("String#<<:") { iterations.times { s = "a"; s << "b" } }
end

# Re-enable GC once done
GC.enable if gc_was_disabled