ruby--ruby/benchmark/vm_case_classes.yml

benchmark:
  vm_case_classes: |
    case :foo
    when Hash
      raise
    when Array
      raise
    end
loop_count: 6000000
compile.c: Emit send for === calls in when statements The checkmatch instruction with VM_CHECKMATCH_TYPE_CASE calls === without a call cache. Emit a send instruction to make the call instead. It includes a call cache. The call cache improves throughput of using when statements to check the class of a given object. This is useful for say, JSON serialization. Use of a regular send instead of checkmatch also avoids taking the VM lock every time, which is good for multi-ractor workloads. Calculating ------------------------------------- master post vm_case_classes 11.013M 16.172M i/s - 6.000M times in 0.544795s 0.371009s vm_case_lit 2.296 2.263 i/s - 1.000 times in 0.435606s 0.441826s vm_case 74.098M 64.338M i/s - 6.000M times in 0.080974s 0.093257s Comparison: vm_case_classes post: 16172114.4 i/s master: 11013316.9 i/s - 1.47x slower vm_case_lit master: 2.3 i/s post: 2.3 i/s - 1.01x slower vm_case master: 74097858.6 i/s post: 64338333.9 i/s - 1.15x slower The vm_case benchmark is a bit slower post patch, possibily due to the larger instruction sequence. The benchmark dispatches using opt_case_dispatch so was not running checkmatch and does not make the === call post patch. 2021-05-26 11:50:37 -04:00			`benchmark:`
			`vm_case_classes: \|`
			`case :foo`
			`when Hash`
			`raise`
			`when Array`
			`raise`
			`end`
			`loop_count: 6000000`