681062 - Slower than v8 on compiled dlmalloc benchmark

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[Alon Zakai (:azakai)]

Attachment: dlmalloc benchmark

Attached is dlmalloc compiled to JS. Results:

m-c -m -j -p      9.273
jm  -m -j -p -n   4.139
v8                2.739

TI is much better than current spidermonkey, but still significantly behind v8.

I think this is fairly important since dlmalloc is real-world code, not an artificial microbenchmark. One difference from microbenchmarks is the size of the code. In bug 678939 Jan mentioned that not compiling IFEQX might be a factor in such scripts, and that should be now done on jm but not m-c, which can potentially explain some of the slowness on m-c (but not that jm is still slower than v8).

Comment 1

[Alon Zakai (:azakai)]

Forgot to say, those numbers are with arguments

  400 400

Comment 2

[Mayank Bansal]

Should target WASM these days.
Closing as Incomplete.