Fixed benchmark reporting when bench optimized away before reporting samples

bjfish · bjfish · commit e0cd9cec35c3 · 2020-09-25T10:22:55.000-05:00
diff --git a/mx.truffleruby/mx_truffleruby_benchmark.py b/mx.truffleruby/mx_truffleruby_benchmark.py
@@ -308,7 +308,7 @@ def runBenchmark(self, benchmark, bmSuiteArgs):
                     'metric.better': 'higher',
                     'metric.iteration': len(samples),
                     'extra.metric.warmedup': 'true',
-                    'extra.metric.elapsed-num': elapsed[-1] + 2.0, # just put the data point beyond the last one a bit
+                    'extra.metric.elapsed-num': elapsed[-1] + 2.0 if elapsed else 2.0, # just put the data point beyond the last one a bit
                     'error': 'optimised away'
                 }]
             else:
