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terminal: render state needs to preserve as much allocation as possible

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This commit is contained in:
Mitchell Hashimoto
2025-11-18 06:44:33 -10:00
parent a860801323
commit 5d85f2382e
2 changed files with 60 additions and 24 deletions
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15
src/benchmark/ScreenClone.zig
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@@ -161,11 +161,22 @@ fn stepClone(ptr: *anyopaque) Benchmark.Error!void {
fn stepRender(ptr: *anyopaque) Benchmark.Error!void {
const self: *ScreenClone = @ptrCast(@alignCast(ptr));
// We do this once out of the loop because a significant slowdown
// on the first run is allocation. After that first run, even with
// a full rebuild, it is much faster. Let's ignore that first run
// slowdown.
const alloc = self.terminal.screens.active.alloc;
var state: terminalpkg.RenderState = .empty;
state.update(alloc, &self.terminal) catch |err| {
log.warn("error cloning screen err={}", .{err});
return error.BenchmarkFailed;
};
// We loop because its so fast that a single benchmark run doesn't
// properly capture our speeds.
const alloc = self.terminal.screens.active.alloc;
for (0..1000) |_| {
var state: terminalpkg.RenderState = .empty;
// Forces a full rebuild because it thinks our screen changed
state.screen = .alternate;
state.update(alloc, &self.terminal) catch |err| {
log.warn("error cloning screen err={}", .{err});
return error.BenchmarkFailed;