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| Original file line number | Diff line number | Diff line change |
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| #!/usr/bin/env python3 | ||
| """Parse Criterion benchmark output files and produce comparison tables. | ||
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| Usage: | ||
| python3 bench_compare.py "Column Title" path/to/bench.txt ["Title2" path2.txt ...] | ||
| python3 bench_compare.py --speedup "Faster" file1.txt "Slower" file2.txt | ||
| nix shell nixpkgs#python3 -c python3 bench_compare.py ... | ||
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| The language prefix (e.g. "java-") is extracted from bench names and appended | ||
| to the column title automatically. | ||
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| With --speedup, exactly two columns are expected and the output is a speedup | ||
| table showing how much faster the first column is vs the second (ratio > 1 | ||
| means first is faster, < 1 means second is faster). | ||
| """ | ||
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| import re | ||
| import sys | ||
| from collections import OrderedDict | ||
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| UNIT_TO_NS = {'ns': 1, 'µs': 1e3, 'us': 1e3, 'ms': 1e6, 's': 1e9} | ||
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| def parse_bench_file(path): | ||
| """Parse a Criterion benchmark output file. | ||
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| Returns (language, results) where results maps | ||
| (category, bench_name) -> nanoseconds as float. | ||
| """ | ||
| results = {} | ||
| current_bench = None | ||
| language = None | ||
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| name_re = re.compile(r'^(\S+?)/(\w+?)-(\S+?)(?:\s+time:|\s*$)') | ||
| time_re = re.compile(r'time:\s+\[[\d.]+ \S+ ([\d.]+) (ns|µs|us|ms|s) [\d.]+ \S+\]') | ||
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| with open(path) as f: | ||
| for line in f: | ||
| stripped = line.strip() | ||
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| name_m = name_re.match(stripped) | ||
| if name_m: | ||
| language = language or name_m.group(2) | ||
| current_bench = (name_m.group(1), name_m.group(3)) | ||
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| time_m = time_re.search(line) | ||
| if time_m and current_bench: | ||
| ns = float(time_m.group(1)) * UNIT_TO_NS[time_m.group(2)] | ||
| results[current_bench] = ns | ||
| current_bench = None | ||
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| return language, results | ||
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| def format_time(ns): | ||
| if ns < 1000: | ||
| return f"{ns:.2f} ns" if ns >= 10 else f"{ns:.1f} ns" | ||
| elif ns < 1e6: | ||
| return f"{ns / 1e3:.2f} us" | ||
| elif ns < 1e9: | ||
| return f"{ns / 1e6:.2f} ms" | ||
| else: | ||
| return f"{ns / 1e9:.2f} s" | ||
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| def format_speedup(ratio): | ||
| if ratio >= 10: | ||
| return f"{ratio:.0f}x" | ||
| else: | ||
| return f"{ratio:.1f}x" | ||
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| def collect_categories(all_results): | ||
| categories = OrderedDict() | ||
| for results in all_results: | ||
| for cat, bench in results: | ||
| if cat not in categories: | ||
| categories[cat] = OrderedDict() | ||
| if bench not in categories[cat]: | ||
| categories[cat][bench] = True | ||
| return categories | ||
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| def print_comparison(columns, all_results): | ||
| categories = collect_categories(all_results) | ||
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| for cat, benches in categories.items(): | ||
| print(f"### {cat}\n") | ||
| header = "Test Case | " + " | ".join(columns) | ||
| sep = "-- | " + " | ".join("--" for _ in columns) | ||
| print(header) | ||
| print(sep) | ||
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| for bench in benches: | ||
| values = [] | ||
| for results in all_results: | ||
| ns = results.get((cat, bench)) | ||
| values.append(format_time(ns) if ns is not None else "") | ||
| print(f"{bench} | " + " | ".join(values)) | ||
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| print() | ||
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| def print_speedup(columns, all_results): | ||
| categories = collect_categories(all_results) | ||
| a_results, b_results = all_results | ||
| title = f"{columns[0]} vs {columns[1]} Speedup" | ||
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| cat_names = list(categories.keys()) | ||
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| print(f"### {title}\n") | ||
| header = "Test Case | " + " | ".join(f"{cat} Speedup" for cat in cat_names) | ||
| sep = "-- | " + " | ".join("--" for _ in cat_names) | ||
| print(header) | ||
| print(sep) | ||
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| all_benches = OrderedDict() | ||
| for benches in categories.values(): | ||
| for b in benches: | ||
| all_benches[b] = True | ||
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| for bench in all_benches: | ||
| values = [] | ||
| for cat in cat_names: | ||
| a_ns = a_results.get((cat, bench)) | ||
| b_ns = b_results.get((cat, bench)) | ||
| if a_ns is not None and b_ns is not None and a_ns > 0: | ||
| values.append(format_speedup(b_ns / a_ns)) | ||
| else: | ||
| values.append("") | ||
| print(f"{bench} | " + " | ".join(values)) | ||
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| print() | ||
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| def main(): | ||
| args = sys.argv[1:] | ||
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| speedup = False | ||
| if "--speedup" in args: | ||
| speedup = True | ||
| args.remove("--speedup") | ||
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| if len(args) < 2 or len(args) % 2 != 0: | ||
| print("Usage: bench_compare.py [--speedup] \"Title1\" file1.txt [\"Title2\" file2.txt ...]", | ||
| file=sys.stderr) | ||
| sys.exit(1) | ||
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| if speedup and len(args) != 4: | ||
| print("--speedup requires exactly two title/file pairs", file=sys.stderr) | ||
| sys.exit(1) | ||
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| columns = [] | ||
| all_results = [] | ||
| for i in range(0, len(args), 2): | ||
| title = args[i] | ||
| path = args[i + 1] | ||
| lang, results = parse_bench_file(path) | ||
| if lang: | ||
| title = f"{title} ({lang.capitalize()})" | ||
| columns.append(title) | ||
| all_results.append(results) | ||
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| if speedup: | ||
| print_speedup(columns, all_results) | ||
| else: | ||
| print_comparison(columns, all_results) | ||
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| if __name__ == "__main__": | ||
| main() |
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