message: better column headers in the benchmark output.
diff: @@ -139,7 +139,16 @@ void Benchmark() {
  if (benchmark_cubic) {
  printf("size");
  for (const auto& result : results) {
  - printf(",%s", PathName(*result).c_str());
  + if (results.size() > 1) {
  + printf(",%s:Gop/s", PathName(*result).c_str());
  + } else {
  + printf(",Gop/s");
  + }
  + if (GetBoolEnvVarOrFalse("RUY_BENCHMARK_PMU")) {
  + printf(
  + ",l1_refill,l2_refill,l3_refill,l1tlb_refill,l2tlb_refill,"
  + "mispred,frontend_stall,backend_stall");
  + }
  }
  printf("\n");
  } else {
  