The attached archive contains emscripten and a very large input file for it (poppler+freetype), which when run as follows js compiler.js < src.cpp.o.ll will run for a while, reach approx 600MB of virtual and resident memory, then exit with "out of memory". This is triggered due to delayedOutOfMemory = (rt->gcBytes > rt->gcMaxBytes) in jscntxt.cpp. gcMaxBytes is 160MB, and gcBytes reaches it. There is, however, over 2GB of free physical memory on this machine. v8 runs the script successfully, reaching a maximum of about 400MB.

Attachment was too big for bugzilla. Here it is: http://syntensity.com/static/src.tar.bz2

Can you try this at the top of the script? gcparam('maxBytes', 1024*1024*1024); For some reason, gcMaxBytes is set to be pretty low in the shell. It's much higher in the browser.

Thanks, that fixes it. Is it feasible to make it so we can allocate any amount of memory for GC (while there is system memory)?