ghc_timings: Simple plotting

ghc_timings.py

@@ -5,6 +5,7 @@ import re
 import sys
 import typing
 import pandas as pd
+from matplotlib import pyplot as pl
 from typing import Iterator
 
 class Timing(typing.NamedTuple):
@@ -26,11 +27,16 @@ def parse_timings(s: str) -> pd.DataFrame:
     df = pd.DataFrame(xs, columns=['phase', 'module', 'time', 'allocd'])
     df['n'] = df.index
     df.sort_values(by=['module', 'n'], inplace=True)
-    return df.drop(columns='n')
+    return df # df.drop(columns='n')
 
 def main() -> None:
     s = sys.stdin.read()
-    print(parse_timings(s).to_markdown())
+    df = parse_timings(s)
+    print(df.to_markdown())
+
+    df2 =  df.set_index(['module', 'phase', 'n'])['time'].unstack('module')
+    df2.plot.bar(title='compile time (ms)', rot=30)
+    pl.show()
 
 if __name__ == '__main__':
     main()