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feat: add glyph cache hit rate percentage to metrics overlay #142

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Merged
forketyfork merged 2 commits into from
Jan 19, 2026
Merged

feat: add glyph cache hit rate percentage to metrics overlay #142

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feat: add glyph cache hit rate percentage to metrics overlay
forketyfork Jan 19, 2026
6ce3440
Merge branch 'main' into metrics-framework
forketyfork Jan 19, 2026
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1 change: 1 addition & 0 deletions docs/configuration.md
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Expand Up @@ -128,6 +128,7 @@ When enabled, press `Cmd+Shift+M` to toggle the metrics overlay in the bottom-ri
- **Frames**: Total rendered frame count
- **FPS**: Frames per second
- **Glyph cache**: Number of cached glyph textures
- **Glyph hit rate**: Cache hit percentage (hits / total accesses)
- **Glyph hits/s**: Glyph cache hits per second
- **Glyph misses/s**: Glyph cache misses per second
- **Glyph evictions/s**: Glyph cache evictions per second
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5 changes: 5 additions & 0 deletions src/ui/components/metrics_overlay.zig
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Expand Up @@ -184,6 +184,11 @@ pub const MetricsOverlayComponent = struct {
lines[line_count] = std.fmt.bufPrint(&line_bufs[line_count], "Glyph cache: {d}", .{cache_size}) catch "Glyph cache: ?";
line_count += 1;

const total_accesses = hit_rate + miss_rate;
const hit_pct: f64 = if (total_accesses > 0) (hit_rate / total_accesses) * 100.0 else 0.0;
lines[line_count] = std.fmt.bufPrint(&line_bufs[line_count], "Glyph hit rate: {d:.1}%", .{hit_pct}) catch "Glyph hit rate: ?";
line_count += 1;

lines[line_count] = std.fmt.bufPrint(&line_bufs[line_count], "Glyph hits/s: {d:.1}", .{hit_rate}) catch "Glyph hits/s: ?";
line_count += 1;

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