RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 20:57:44 +00:00
Code Issues Activity Actions

LibJS: Recycle up to 64 HeapBlocks to improve performance :^)

Browse source 
This patch adds a BlockAllocator to the GC heap where we now cache up to
64 HeapBlock-sized mmap's that get recycled when allocating HeapBlocks.

This improves test-js runtime performance by ~35%, pretty cool! :^)
This commit is contained in:
Andreas Kling 2021-05-27 19:01:26 +02:00
parent d2149c153c
commit e9081a2644
6 changed files with 101 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

7
Userland/Libraries/LibJS/Heap/Allocator.cpp
View file

@ -6,6 +6,8 @@
#include <AK/Badge.h>
#include <LibJS/Heap/Allocator.h>
#include <LibJS/Heap/BlockAllocator.h>
#include <LibJS/Heap/Heap.h>
#include <LibJS/Heap/HeapBlock.h>
namespace JS {
@ -36,8 +38,11 @@ Cell* Allocator::allocate_cell(Heap& heap)
void Allocator::block_did_become_empty(Badge<Heap>, HeapBlock& block)
{
auto& heap = block.heap();
block.m_list_node.remove();
delete &block;
// NOTE: HeapBlocks are managed by the BlockAllocator, so we don't want to `delete` the block here.
block.~HeapBlock();
heap.block_allocator().deallocate_block(&block);
}
void Allocator::block_did_become_usable(Badge<Heap>, HeapBlock& block)