[webkit-dev] bmalloc design question about relation with std malloc

Geoffrey Garen ggaren at apple.com
Mon Apr 30 09:46:46 PDT 2018

If we have just a few allocations, we should use the mmap based allocator. This preserves the invariant that bmalloc can be used as a general-purpose malloc implementation.

If we have lots of small allocations, we should probably reconsider the design.

I’m not familiar with the new uses of std::vector inside bmalloc. That’s not something I would recommend.


> On Apr 30, 2018, at 3:35 AM, Yusuke SUZUKI <utatane.tea at gmail.com> wrote:
> Hi, WebKittens,
> IIRC, bmalloc uses mmap based page allocator for internal memory use. For example, bmalloc::Vector uses it instead of calling malloc.
> But recent changes start using std::vector, which means it uses std malloc under the hood.
> So my question is, if we want some internal memory allocation in bmalloc, shoud we use std::malloc? Or should we use mmap based allocator?
> Best regards,
> Yusuke Suzuki
> -- 
> Regards,
> Yusuke Suzuki
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