09.12.2016, 12:28, "fdgfd gfdgfdg" <probablynotthebest...@gmail.com>: > There are two ways webkit gets memory using mmap from the operating system, > one is WTF::OSAllocator and the second one is WTF::fastMalloc which seems to > rely on tcmalloc to get memory from os. I'm using qt bindings. What is the > purpose of each of them ?
OSAllocator has Usage enum in the beginning of its declaration, it lists primary cases where OSAllocator is used. Generally speaking, OSAllocator is used for large-sized allocations with sizes comparable to OS memory pages (typically 4K) On the contrary, fastMalloc is used for smaller allocations, it's most common usage is WTF_MAKE_FAST_ALLOCATED macro which declares new and delete operators in a large number of classes, e.g. WebCore::Node. > I'm using qt bindings. You should better switch to [1], it's much closer to the modern WebKit, see [2] for more details. In particular, tcmalloc is not used for a long time, it was superceeded by bmalloc. Since then, some usages of OSAllocator were replaced with bmalloc/fastMalloc [1] https://github.com/annulen/webkit [2] http://qtwebkit.blogspot.com/2016/08/qtwebkit-im-back.html > , > > _______________________________________________ > webkit-help mailing list > webkit-help@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-help -- Regards, Konstantin _______________________________________________ webkit-help mailing list webkit-help@lists.webkit.org https://lists.webkit.org/mailman/listinfo/webkit-help
