Option to increase or remove heap memory limit

[kzhsw]

Description

Make an option, in flags or command-line, to allow users to increase or remove heap memory limit, to use heap larger than 4GB in systems with much greater memory.

Who's implementing?

• I'm willing to implement this feature myself

The problem

Currently chrome limits the heap memory (or the memory of a render process) to likely 4GB, but larger heap would be useful for debugging heap using the memory profiler, or running large, resource-consuming app on web.
This is previously discussed on many forums, but now I can not find a thing that works without rebuilding the chromium itself.

Previous contexts:

• How to increase electron max memory limit (--max_old_space_size) electron/electron#2056
• [Bug]: memory limitations introduced with Electron 14+ electron/electron#31330
• [Docs]: Document V8's 4GB memory cap electron/electron#33994
• https://bugs.chromium.org/p/chromium/issues/detail?id=1243314#c31
• https://bugs.chromium.org/p/chromium/issues/detail?id=1414681
• https://bugs.chromium.org/p/chromium/issues/detail?id=416284
• https://bugs.chromium.org/p/chromium/issues/detail?id=1347602
• https://bugs.chromium.org/p/chromium/issues/detail?id=1081316
• https://bugs.chromium.org/p/chromium/issues/detail?id=1289647
• https://superuser.com/questions/1675677/error-code-out-of-memory-how-to-allocate-more-memory-to-google-chrome-64-gb
• https://stackoverflow.com/questions/29620041/is-there-any-memory-limit-for-google-chrome-browser/
• https://stackoverflow.com/questions/48387040/how-do-i-determine-the-correct-max-old-space-size-for-node-js
• https://stackoverflow.com/questions/38587346/max-old-space-size-set-to-4gb-actually-limits-to-2gb
• https://www.electronjs.org/blog/v8-memory-cage

Possible solutions

• Make the flag --max-old-space-size and --max-semi-space-size work like in node.js
• Make a flag to disable pointer compression (this could be a compile-time flag)
• Get things upstreamed

Alternatives

Use Firefox which has larger limit on heap, and a slower js engine.

Additional context

No response

[richard-stafflink]

Haven't tested it, but does this work:

chrome --js-flags="--max_old_space_size=8192"

[kzhsw]

Haven't tested it, but does this work:

chrome --js-flags="--max_old_space_size=8192"

This could increase limit for ArrayBuffers, but not js objects, nor postMessage