From b1bcdc96ca4451be95caa00fe71aafb578611e34 Mon Sep 17 00:00:00 2001 From: Andrew Kelley Date: Wed, 20 May 2020 15:57:02 -0400 Subject: [PATCH] arena allocator: smaller minimum allocation size --- lib/std/heap/arena_allocator.zig | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/lib/std/heap/arena_allocator.zig b/lib/std/heap/arena_allocator.zig index daed17d6b3..337edf6dc0 100644 --- a/lib/std/heap/arena_allocator.zig +++ b/lib/std/heap/arena_allocator.zig @@ -47,12 +47,8 @@ pub const ArenaAllocator = struct { fn createNode(self: *ArenaAllocator, prev_len: usize, minimum_size: usize) !*BufNode { const actual_min_size = minimum_size + @sizeOf(BufNode); - var len = prev_len; - while (true) { - len += len / 2; - len += mem.page_size - @rem(len, mem.page_size); - if (len >= actual_min_size) break; - } + const big_enough_len = prev_len + actual_min_size; + const len = big_enough_len + big_enough_len / 2; const buf = try self.child_allocator.alignedAlloc(u8, @alignOf(BufNode), len); const buf_node_slice = mem.bytesAsSlice(BufNode, buf[0..@sizeOf(BufNode)]); const buf_node = &buf_node_slice[0];