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Default Rust thread stack size is 2MB #17044
Description
According to std::rt::min_stack(), the minimum Rust stack size is 2MB. Given that the default stack size on Windows is 1MB, and that is generally plenty for any program I've seen, this seems a bit excessive.
This, btw, contributes to doctest failure of "futures" example from guide-tasks.md on Windows: this example spawns 1000 threads, and in conjunction with #17043, this results in it running out of memory.
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[-]Default rust stack size is 2MB[/-][+]Default Rust thread stack size is 2MB[/+]thestinger commentedon Sep 6, 2014
The Rust compiler uses a 6MiB stack and then increase than to 20MiB (!!!) when optimizations are disabled. The default stack size on Linux is 8MiB, so that's likely how much is available for the main thread. Rust tends to need a ridiculous amount of stack space, especially without optimizations.
vadimcn commentedon Sep 6, 2014
If this is indeed the intended value, at least the test should be adjusted, because right now it's guaranteed to fail on a 32-bit Windows machine, even if the large-address-aware flag were fixed.
Apply safety comment to compound assignment statement (rust-lang#17044)