Created
July 11, 2019 10:02
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profiling bashrc: check for long loading time code
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| import argparse | |
| import heapq | |
| parser = argparse.ArgumentParser(description='Analyze bash start log for speed.') | |
| parser.add_argument('filename', help='often /tmp/bashload.<PID>.log') | |
| parser.add_argument('-n', default=20, help='number of results to show') | |
| args = parser.parse_args() | |
| filename, n = args.filename, int(args.n) | |
| #add following to ~/.bashrc | |
| ###BEGIN PROFILING | |
| #PS4='+ $(date "+%s.%N")\011 ' | |
| #exec 3>&2 2>/tmp/bashload.$$.log | |
| #set -x | |
| ###END PROFILING | |
| #set +x | |
| #exec 2>&3 3>&- | |
| with open(filename, 'r') as f: | |
| q = [] | |
| prev_time = None | |
| total = 0 | |
| for line in f.readlines(): | |
| #ignore empty/invalid lines | |
| if not line or not line.strip(): | |
| continue | |
| line = line.split() | |
| if '+' not in line[0] or len(line) < 3: | |
| continue | |
| text = ' '.join(line[2:]) | |
| #trim out long lines | |
| if len(text) > 100: | |
| text = text[:100] | |
| #compute diff | |
| time = float(line[1]) | |
| diff = time - prev_time if prev_time is not None else 0 | |
| total += diff | |
| prev_time = time | |
| heapq.heappush(q, (diff, text)) | |
| for diff, text in heapq.nlargest(n, q): | |
| print diff, 's:', text | |
| print 'Total loading time[s]: ', total |
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