[benchmarks] reintroduce prepare

Always running the possibly very expensive preparation code when
a benchmark object is created is not reasonable when benchmarks
should only be summarized.

1 files changed, 7 insertions, 8 deletions

diff --git a/bench.py b/bench.py
index adecc89..6a23cd0 100755
--- a/bench.py
+++ b/bench.py
@@ -181,14 +181,13 @@ def main():
             print_error(f"Skipping {bench}! Loading failed.")
             continue
 
-            try:
-                print_status("Preparing", bench, "...")
-                bench = member()
-                break
-            except Exception:
-                print_error(traceback.format_exc())
-                print_error(f"Skipping {bench}! Preparing failed.")
-                continue
+        try:
+            print_status("Preparing", bench, "...")
+            bench.prepare()
+        except Exception:
+            print_error(traceback.format_exc())
+            print_error(f"Skipping {bench}! Preparing failed.")
+            continue
 
         if args.analyze:
             analyze_bench(bench)