580064 - JM: PIC: Leap-before-you look GETELEM pattern

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, enhancement)

Description

[Chris Leary [:cdleary] (not checking bugmail)]

In SunSpider's date-format-xparb there's a snippet that does:

    if (Date.formatFunctions[format] == null) {
        Date.createNewFormat(format);
    }

... where createNewFormat adds that property to the formatFunctions object. It may be a common pattern we can optimize for -- currently we disable PICs on first missed lookup. It's only a 4k trip count loop in SunSpider, so deferring till we have a benchmark we can see good results on.

Comment 1

[Luke Wagner [:luke]]

JM removed.