> to b) let's say I compile my d8 binary, one time for x86. Now I am running > the benchmarks above on 2 different x86 processors (binary is the same!). > Would you expect the same executed/retired instruction count? One reason > why you wouldn't have the same count would be for instance, if somebody in > the benchmark measures time, and there are loops that spin based on that or > anything like that. >
If the CPUs don't have the same extensions, I wouldn't expect the generated code to be the same. At what precise level of difference in extensions this matters I can't say, it depends one what instruction set extensions V8 specifically checks for, but certainly SSE version, and possibly FMA? -- -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
