765631 - Ionmonkey: Ion 2x slower on reduced ss-format-tofte

Status: RESOLVED WORKSFORME

(Core :: JavaScript Engine, defect)

Description

[Hannes Verschore [:h4writer]]

The following testcase is 2x slower on Ion compared to JM

Date.prototype.formatDate = function(input, time) {
    function a() {
        if (beforeNY <= 2 && weekday <= 2 - beforeNY) {
            if (arrayExists(switches, ia[ij])) {
                ia[ij] = eval(ia[ij] + "()");
            }
        }
    }
}
var date = new Date("1/1/2007 1:11:11");
for (i = 0; i < 400000; ++i) {
    var shortFormat = date.formatDate("Y-m-d");
}

JM (build-32/js --no-ion): 0.518s 
Ion (build-32/js): 1.008s

Comment 1

[Sean Stangl [:sstangl]]

Needs argument object support.

Comment 2

[David Anderson [:dvander] - inactive, e-mail if emergency]

I can still reproduce this - it's not clear how much it affects our SunSpider score but it could be worth looking into.

Comment 3

[Sean Stangl [:sstangl]]

Times are now (on x86_64):

ion:   260ms
jm+ti: 255ms
v8:    43ms

Comment 4

[Jan de Mooij [:jandem]]

I get 186 ms now without any flags flags and with --no-ion.