tooling: adds a --profile=<file> option to fontbuild for profiling runs and adds misc/tools/fmtprofile.py for printing and inspecting profile results

1 files changed, 24 insertions, 0 deletions

diff --git a/misc/tools/fmtprofile.py b/misc/tools/fmtprofile.py
new file mode 100755
index 000000000..695d88ee7
--- /dev/null
+++ b/misc/tools/fmtprofile.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+# encoding: utf8
+#
+# Formats a Python profile dump from for example `fontbuild --profile=file ...`
+#
+import argparse, pstats
+from pstats import SortKey
+
+def main():
+  argparser = argparse.ArgumentParser(description='Formats a Python profile dump')
+  argparser.add_argument('infile', metavar='<file>', type=str, help='Python pstats file')
+  argparser.add_argument('-n', '--limit', metavar='N', default=None, type=int,
+                         help='Only print the top N entries')
+  argparser.add_argument('--sort', metavar='<key>', default=['time'], nargs='+', type=str,
+                         help='Sort by keys (default is time.) Available keys: ' + ', '.join(SortKey))
+  args = argparser.parse_args()
+  p = pstats.Stats(args.infile)
+  p.strip_dirs()
+  p.sort_stats(SortKey(*args.sort))
+  p.print_stats(args.limit)
+
+
+if __name__ == '__main__':
+  main()