Store identifier in local

[TechPizzaDev]

ArrayStressBenchmark:

BenchmarkDotNet=v0.13.5, OS=Windows 10 (10.0.19045.3086/22H2/2022Update)
Intel Core i7-4720HQ CPU 2.60GHz (Haswell), 1 CPU, 8 logical and 4 physical cores
.NET SDK=7.0.302
  [Host]     : .NET 6.0.16 (6.0.1623.17311), X64 RyuJIT AVX2
  DefaultJob : .NET 6.0.16 (6.0.1623.17311), X64 RyuJIT AVX2

main:

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Execute	24.45 ms	0.132 ms	0.123 ms	2250.0000	187.5000	7.18 MB
Execute_ParsedScript	22.74 ms	0.106 ms	0.094 ms	2312.5000	93.7500	7.15 MB

PR:

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Execute	22.85 ms	0.106 ms	0.088 ms	2250.0000	187.5000	7.18 MB
Execute_ParsedScript	21.95 ms	0.076 ms	0.064 ms	2250.0000	250.0000	7.15 MB

[lahma]

I didn't get as dramatic change as you did between main and this, but as it doesn't hurt I'm merging. Thanks!

BenchmarkDotNet=v0.13.5, OS=Windows 11 (10.0.23481.1000)
AMD Ryzen 9 5950X, 1 CPU, 32 logical and 16 physical cores
.NET SDK=7.0.304
  [Host]     : .NET 6.0.18 (6.0.1823.26907), X64 RyuJIT AVX2
  DefaultJob : .NET 6.0.18 (6.0.1823.26907), X64 RyuJIT AVX2

Jint.Benchmark.ArrayStressBenchmark

Diff	Method	Mean	Error	Allocated
Old	Execute	10.74 ms	0.086 ms	7.18 MB
New		10.65 ms (-1%)	0.038 ms	7.18 MB (0%)
Old	Execute_ParsedScript	10.67 ms	0.030 ms	7.15 MB
New		10.59 ms (-1%)	0.024 ms	7.15 MB (0%)