1935626 - Reduce the number of VMFunction calls on Speedometer 3

Status: NEW

(Core :: JavaScript Engine: JIT, enhancement, P2)

Description

[Jan de Mooij [:jandem]]

Attachment: List of VMFunction calls on Sp3

I collected some data on VMFunction calls for bug 1913924 and I got some interesting results.

I'm attaching a list of VM functions with their call count + percentage when starting the browser and running the full Speedometer 3 benchmark.

For example, the top 2 functions are ConcatStrings and Lambda and these operations can likely be inlined in Baseline too. This would eliminate almost 20% of calls.

Comment 1

[Jan de Mooij [:jandem]]

Attachment: List of callWithABI calls on Speedometer 3

This is a list of callWithABI calls for Speedometer 3. This data is a bit harder to collect - I replaced masm.setup* with masm.printf(__FUNCTION__); masm.setup*.

VMFunction wrappers account for ~43% of these.

I wasn't expecting visitMathFunctionD to show up with 3.4% of all calls.

Comment 2

[Jan de Mooij [:jandem]]

(In reply to Jan de Mooij [:jandem] from comment #1)

I wasn't expecting visitMathFunctionD to show up with 3.4% of all calls.

For what it's worth, the Math functions getting called there:

 738880 Log
  92675 Log10
  87056 Sin (fdlibm)
  87056 Cos (fdlibm)
  43528 ASin