From cec27925c596a9e04d2e1674b4893e853f87efa1 Mon Sep 17 00:00:00 2001
From: Christian Rocha <christian@rocha.is>
Date: Sat, 7 Jun 2025 09:00:33 -0400
Subject: [PATCH] perf(anim): preallocate strings.Builder capacities

---
 internal/tui/components/anim/anim.go | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/internal/tui/components/anim/anim.go b/internal/tui/components/anim/anim.go
index 3a7b615f6b09a7b8c3a6fac5909cccc6eccb4bb3..c39de0d899a1b4eaf3896ea32b02883374af1195 100644
--- a/internal/tui/components/anim/anim.go
+++ b/internal/tui/components/anim/anim.go
@@ -241,8 +241,19 @@ func (a *anim) updateChars(chars *[]cyclingChar) {
 
 // View renders the animation.
 func (a anim) View() tea.View {
-	t := styles.CurrentTheme()
-	var b strings.Builder
+	var (
+		t = styles.CurrentTheme()
+		b strings.Builder
+	)
+
+	// Pre-allocate builder capacity to avoid reallocations.
+	// Estimate: cycling chars + label chars + ellipsis + style overhead.
+	const (
+		bytesPerChar = 20 // ANSI styling
+		bufferSize   = 50 // ellipsis and safety margin
+	)
+	estimatedCap := len(a.cyclingChars)*bytesPerChar + len(a.labelChars)*bytesPerChar + bufferSize
+	b.Grow(estimatedCap)
 
 	for i, c := range a.cyclingChars {
 		if len(a.ramp) > i {