TM: Regression on dromaeo-object-string lastIndexOf

RESOLVED INCOMPLETE

Status

()

Core
JavaScript Engine
RESOLVED INCOMPLETE
9 years ago
7 years ago

People

(Reporter: dmandelin, Unassigned)

Tracking

Trunk
Points:
---

Firefox Tracking Flags

(Not tracked)

Details

(Reporter)

Description

9 years ago
The following revision seems to have regressed the lastIndexOf subtest by 2.5-4x:

changeset:   26344:1c6be1c210b9
user:        Andreas Gal <gal@mozilla.com>
date:        Fri Mar 20 18:52:11 2009 -0700
files:       js/src/jsapi.h js/src/jsfun.h js/src/jstracer.cpp js/src/jstracer.h
description:
Support calling arbitrary JSFastNatives from trace (463238, r=brendan).

Comment 1

9 years ago
maybe bug 483723 would help this?

Comment 2

9 years ago
4x is a lot. Any idea where exactly the slowdown is coming from? We used to have a slightly more efficient builtin there, but that shouldn't make a 4x difference.
(Reporter)

Comment 3

9 years ago
I don't know the cause; right now I'm just trying to get the full list of Dromaeo regressions so we know what's going on.

I found that this regression also affects the 'substr' and 'indexOf' subtests.
David, do you know whether this is still an issue?
Closing out old regressions that have since been eclipsed by gains and overtaken by rearchitecture.
Status: NEW → RESOLVED
Last Resolved: 7 years ago
Resolution: --- → INCOMPLETE
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