714923 - When adding many properties to an object in a web worker, processing fails silently

Status: RESOLVED DUPLICATE of bug 711388

(Core :: DOM: Core & HTML, defect)

Description

[David Illsley]

I'm writing a simple app to parse very large files containing hundreds of thousands of lines. I started using a naive approach of adding a property for each line. Strangely when I do this in a web worker, processing fails silently for me in Firefox (works fine in Chrome). Adding the same properties to an object on the main thread completes fine.

There's no error reported via the onerror handler, nor in the error console. I've provided a simplified test case which reproduces reliably for me available at:
http://downloads.illsley.org/temp/bigobject.html

The buttons up to 100,000 work fine for me, but the 1,000,000 in the web worker never receives the completed message.

Comment 1

[Kyle Huey (Exited; not receiving bugmail, old account, do not use)]

Heap exhaustion?

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

WARNING: Out of memory!: file mozilla/dom/workers/WorkerPrivate.cpp, line 3233

Comment 3

[Ben Turner (not reading bugmail, use the needinfo flag!)]

We need bug 711388 fixed.