render_bench_test.go RawHistoryFolder

1package tui
2
3import (
4	"bytes"
5	"fmt"
6	"strings"
7	"testing"
8)
9
10func BenchmarkRendererDrawLogToolStorm(b *testing.B) {
11	for _, width := range []int{48, 80, 160} {
12		b.Run(fmt.Sprintf("width=%d", width), func(b *testing.B) {
13			var out bytes.Buffer
14			r := NewRenderer(&out)
15			r.Resize(width, 40)
16			chat := benchmarkRendererChat(1600, width)
17			bottom := []string{"working", "▌ input"}
18			r.DrawLog(chat, bottom, 1, 2)
19			out.Reset()
20
21			b.ReportAllocs()
22			b.ResetTimer()
23			for n := 0; n < b.N; n++ {
24				// Keep most of the storm stable while exercising the
25				// renderer's row-diff path with a changing suffix.
26				frame := append([]string(nil), chat...)
27				frame[len(frame)-1] = fmt.Sprintf("tool output %d", n)
28				r.DrawLog(frame, bottom, 1, 2)
29				out.Reset()
30			}
31		})
32	}
33}
34
35func benchmarkRendererChat(rows, width int) []string {
36	chat := make([]string, rows)
37	payload := strings.Repeat("x", width)
38	for i := range chat {
39		chat[i] = fmt.Sprintf("│ tool-%03d result %s", i, payload)
40	}
41	return chat
42}