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slight perf improvement to concurrently queueing tasks

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This commit is contained in:
Jarred Sumner
2022-04-11 19:09:14 -07:00
parent f357377de9
commit 1d79703d24
1 changed files with 6 additions and 4 deletions
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10
src/javascript/jsc/javascript.zig
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@@ -635,10 +635,12 @@ pub const VirtualMachine = struct {
this.tasks.ensureUnusedCapacity(add) catch unreachable;
{
@fence(.SeqCst);
while (this.concurrent_tasks.readItem()) |task| {
this.tasks.writeItemAssumeCapacity(task);
}
var writable = std.mem.sliceAsBytes(this.tasks.writableSlice(0));
const readable = std.mem.sliceAsBytes(this.concurrent_tasks.readableSlice(0));
@memcpy(writable.ptr, readable.ptr, @minimum(writable.len, readable.len));
this.tasks.count += add;
this.concurrent_tasks.head = 0;
this.concurrent_tasks.count = 0;
}
_ = this.pending_tasks_count.fetchAdd(add, .Monotonic);