Agent Skills › erweixin/RaTeX › render-bench

render-bench

GitHub

用于 RaTeX 渲染性能基准测试，支持公式渲染吞吐量、字体缓存冷/热启动耗时及渲染阶段分解。适用于性能剖析与优化前后对比。

.agents/skills/render-bench/SKILL.md erweixin/RaTeX

Trigger Scenarios

需要剖析渲染性能瓶颈时对比代码优化前后的渲染性能差异时

Install

npx skills add erweixin/RaTeX --skill render-bench -g -y

More Options

Non-standard path

npx skills add https://github.com/erweixin/RaTeX/tree/main/.agents/skills/render-bench -g -y

Use without installing

npx skills use erweixin/RaTeX@render-bench

指定 Agent (Claude Code)

npx skills add erweixin/RaTeX --skill render-bench -a claude-code -g -y

安装 repo 全部 skill

npx skills add erweixin/RaTeX --all -g -y

预览 repo 内 skill

npx skills add erweixin/RaTeX --list

SKILL.md

Frontmatter

{
    "name": "render-bench",
    "description": "Run RaTeX rendering performance benchmarks (100-formula PNG\/SVG\/PDF, cold-vs-hot font cache timing, phase breakdown). Use when profiling render performance or comparing before\/after optimization changes."
}

Render performance benchmarks

Prerequisites

Rust toolchain with --release.
KaTeX TTFs in fonts/ (committed in-repo; 20 .ttf files).
(Optional) CJK/emoji system fonts for the full CJK/emoji categories.

Commands

1. Full 100-formula benchmark

cargo test -p ratex-render --test bench_render --release -- --ignored --nocapture

Renders 100 formulas across 6 categories (math, complex, matrix, cjk, emoji, chem) in PNG, SVG, SVG-standalone, and PDF. Prints per-category averages and overall throughput (formulas/sec).

Warmup: 1 iteration per formula. Measurement: 3 iterations, averaged.

2. Font cache cold vs hot timing

cargo test -p ratex-render --test font_cache_timing --release -- --ignored --nocapture

Measures 3 formulas: first pass (cold — disk I/O for font loading), second pass (hot — OnceLock cache hits). Reports speedup ratio.

3. Render phase breakdown

cargo test -p ratex-render --test phase_breakdown --release -- --ignored --nocapture

Per-formula breakdown: parse+layout vs render phase timing. 6 formulas including CJK and emoji cases. Warmup: 3 iterations, Measurement: 10 iterations, averaged.

4. Compare before/after (quick diff)

Useful when optimizing a specific path:

# Before (on main)
cargo test -p ratex-render --test phase_breakdown --release -- --ignored --nocapture 2>&1 | tee /tmp/before.txt

# After (on branch)
cargo test -p ratex-render --test phase_breakdown --release -- --ignored --nocapture 2>&1 | tee /tmp/after.txt

# Diff the tables
diff /tmp/before.txt /tmp/after.txt

Quick checklist

Run cargo test -p ratex-render --test bench_render --release -- --ignored --nocapture for the full picture.
For quick iteration, use phase_breakdown (faster, 6 formulas).
For font-loading specific changes, use font_cache_timing.
Always use --release — debug builds are 10-50× slower and meaningless for perf comparison.