ezbench.py: avoid listing all the files twice

This commit also reduces the number of comparaisons as we restrict the
search of run files to the list of files related to the current commit.

This cuts the execution time by 60% on insane reports.

1 files changed, 3 insertions, 2 deletions

diff --git a/utils/ezbench.py b/utils/ezbench.py
index 1fe2257..a42532c 100644
--- a/utils/ezbench.py
+++ b/utils/ezbench.py
@@ -1062,8 +1062,9 @@ def genPerformanceReport(log_folder, silentMode = False):
         commit = Commit(sha1, full_name, compile_log, patch, label)
 
         # find all the benchmarks
+        files_list = os.listdir()
         pattern = "{sha1}_bench".format(sha1=commit.sha1)
-        benchFiles = [f for f in os.listdir(".") if f.startswith(pattern)]
+        benchFiles = [f for f in files_list if f.startswith(pattern)]
         benchs_txt = ""
         for benchFile in benchFiles:
             # Skip when the file is a run file (finishes by #XX)
@@ -1104,7 +1105,7 @@ def genPerformanceReport(log_folder, silentMode = False):
 
             # Look for the runs
             run_re = re.compile(r'^{benchFile}#[0-9]+$'.format(benchFile=benchFile))
-            runsFiles = [f for f in os.listdir() if run_re.search(f)]
+            runsFiles = [f for f in benchFiles if run_re.search(f)]
             runsFiles.sort(key=lambda x: '{0:0>100}'.format(x).lower()) # Sort the runs in natural order
             for runFile in runsFiles:
                 data, unit, more_is_better = readCsv(runFile)