Match new benchmark driver default output

Author: tbkka

benchmark/scripts/compare_perf_tests.py

@@ -503,7 +503,7 @@ def parse_results(self, lines):
         Returns a list of `PerformanceTestResult`s.
         """
         match_json = re.compile(r"\s*({.*)")
-        match_header = re.compile(r"( *#[, \t]+TEST[, \t]+SAMPLES[, \t].*)")
+        match_header = re.compile(r"( *#[, \t]+TEST.*)")
         match_legacy = re.compile(r" *(\d+[, \t].*)")
         header = ""
         for line in lines: