A sample diff thats ports FormatTests to benchmarks

Summary:
Is there any better solution? Maybe a generic flag in Benchmarks to say
please don't run benchmarks?

Test Plan: (not in folly)

Reviewed By: andrei.alexandrescu@fb.com

FB internal diff: D503619

folly/test/FormatBenchmark.cpp

+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "folly/Format.h"
+
+#include <glog/logging.h>
+
+#include "folly/FBVector.h"
+#include "folly/Benchmark.h"
+#include "folly/dynamic.h"
+#include "folly/json.h"
+
+using namespace folly;
+
+namespace {
+
+char bigBuf[300];
+
+}  // namespace
+
+BENCHMARK(octal_sprintf, iters) {
+  while (iters--) {
+    sprintf(bigBuf, "%o", static_cast<unsigned int>(iters));
+  }
+}
+
+BENCHMARK_RELATIVE(octal_uintToOctal, iters) {
+  while (iters--) {
+    detail::uintToOctal(bigBuf, detail::kMaxOctalLength,
+                        static_cast<unsigned int>(iters));
+  }
+}
+
+BENCHMARK_DRAW_LINE()
+
+BENCHMARK(hex_sprintf, iters) {
+  while (iters--) {
+    sprintf(bigBuf, "%x", static_cast<unsigned int>(iters));
+  }
+}
+
+BENCHMARK_RELATIVE(hex_uintToHex, iters) {
+  while (iters--) {
+    detail::uintToHexLower(bigBuf, detail::kMaxHexLength,
+                           static_cast<unsigned int>(iters));
+  }
+}
+
+BENCHMARK_DRAW_LINE()
+
+BENCHMARK(intAppend_sprintf) {
+  fbstring out;
+  for (int i = -1000; i < 1000; i++) {
+    sprintf(bigBuf, "%d", i);
+    out.append(bigBuf);
+  }
+}
+
+BENCHMARK_RELATIVE(intAppend_to) {
+  fbstring out;
+  for (int i = -1000; i < 1000; i++) {
+    toAppend(i, &out);
+  }
+}
+
+BENCHMARK_RELATIVE(intAppend_format) {
+  fbstring out;
+  for (int i = -1000; i < 1000; i++) {
+    format(&out, "{}", i);
+  }
+}
+
+BENCHMARK_DRAW_LINE()
+
+BENCHMARK(bigFormat_sprintf, iters) {
+  while (iters--) {
+    for (int i = -100; i < 100; i++) {
+      sprintf(bigBuf,
+              "%d %d %d %d %d"
+              "%d %d %d %d %d"
+              "%d %d %d %d %d"
+              "%d %d %d %d %d",
+              i, i+1, i+2, i+3, i+4,
+              i+5, i+6, i+7, i+8, i+9,
+              i+10, i+11, i+12, i+13, i+14,
+              i+15, i+16, i+17, i+18, i+19);
+    }
+  }
+}
+
+BENCHMARK_RELATIVE(bigFormat_format, iters) {
+  char* p;
+  auto writeToBuf = [&p] (StringPiece sp) mutable {
+    memcpy(p, sp.data(), sp.size());
+    p += sp.size();
+  };
+
+  while (iters--) {
+    for (int i = -100; i < 100; i++) {
+      p = bigBuf;
+      format("{} {} {} {} {}"
+             "{} {} {} {} {}"
+             "{} {} {} {} {}"
+             "{} {} {} {} {}",
+              i, i+1, i+2, i+3, i+4,
+              i+5, i+6, i+7, i+8, i+9,
+              i+10, i+11, i+12, i+13, i+14,
+              i+15, i+16, i+17, i+18, i+19)(writeToBuf);
+    }
+  }
+}
+
+// Benchmark results on my dev server (dual-CPU Xeon L5520 @ 2.7GHz)
+//
+// ============================================================================
+// folly/test/FormatTest.cpp                         relative  ns/iter  iters/s
+// ============================================================================
+// octal_sprintf                                               100.57     9.94M
+// octal_uintToOctal                                 2599.47%    3.87   258.46M
+// ----------------------------------------------------------------------------
+// hex_sprintf                                                 100.13     9.99M
+// hex_uintToHex                                     3331.75%    3.01   332.73M
+// ----------------------------------------------------------------------------
+// intAppend_sprintf                                           406.07K    2.46K
+// intAppend_to                                       166.03%  244.58K    4.09K
+// intAppend_format                                   147.57%  275.17K    3.63K
+// ----------------------------------------------------------------------------
+// bigFormat_sprintf                                           255.40K    3.92K
+// bigFormat_format                                   102.18%  249.94K    4.00K
+// ============================================================================
+
+int main(int argc, char *argv[]) {
+  google::ParseCommandLineFlags(&argc, &argv, true);
+  runBenchmarks();
+  return 0;
+}

folly/test/FormatTest.cpp

@@ -20,7 +20,6 @@
 #include <gtest/gtest.h>
 
 #include "folly/FBVector.h"
-#include "folly/Benchmark.h"
 #include "folly/dynamic.h"
 #include "folly/json.h"
 
@@ -281,130 +280,9 @@ TEST(Format, Custom) {
   EXPECT_EQ("XX<key=hello, value=42>", fstr("{:X>23}", kv));
 }
 
-namespace {
-
-char bigBuf[300];
-
-}  // namespace
-
-BENCHMARK(octal_sprintf, iters) {
-  while (iters--) {
-    sprintf(bigBuf, "%o", static_cast<unsigned int>(iters));
-  }
-}
-
-BENCHMARK_RELATIVE(octal_uintToOctal, iters) {
-  while (iters--) {
-    detail::uintToOctal(bigBuf, detail::kMaxOctalLength,
-                        static_cast<unsigned int>(iters));
-  }
-}
-
-BENCHMARK_DRAW_LINE()
-
-BENCHMARK(hex_sprintf, iters) {
-  while (iters--) {
-    sprintf(bigBuf, "%x", static_cast<unsigned int>(iters));
-  }
-}
-
-BENCHMARK_RELATIVE(hex_uintToHex, iters) {
-  while (iters--) {
-    detail::uintToHexLower(bigBuf, detail::kMaxHexLength,
-                           static_cast<unsigned int>(iters));
-  }
-}
-
-BENCHMARK_DRAW_LINE()
-
-BENCHMARK(intAppend_sprintf) {
-  fbstring out;
-  for (int i = -1000; i < 1000; i++) {
-    sprintf(bigBuf, "%d", i);
-    out.append(bigBuf);
-  }
-}
-
-BENCHMARK_RELATIVE(intAppend_to) {
-  fbstring out;
-  for (int i = -1000; i < 1000; i++) {
-    toAppend(i, &out);
-  }
-}
-
-BENCHMARK_RELATIVE(intAppend_format) {
-  fbstring out;
-  for (int i = -1000; i < 1000; i++) {
-    format(&out, "{}", i);
-  }
-}
-
-BENCHMARK_DRAW_LINE()
-
-BENCHMARK(bigFormat_sprintf, iters) {
-  while (iters--) {
-    for (int i = -100; i < 100; i++) {
-      sprintf(bigBuf,
-              "%d %d %d %d %d"
-              "%d %d %d %d %d"
-              "%d %d %d %d %d"
-              "%d %d %d %d %d",
-              i, i+1, i+2, i+3, i+4,
-              i+5, i+6, i+7, i+8, i+9,
-              i+10, i+11, i+12, i+13, i+14,
-              i+15, i+16, i+17, i+18, i+19);
-    }
-  }
-}
-
-BENCHMARK_RELATIVE(bigFormat_format, iters) {
-  char* p;
-  auto writeToBuf = [&p] (StringPiece sp) mutable {
-    memcpy(p, sp.data(), sp.size());
-    p += sp.size();
-  };
-
-  while (iters--) {
-    for (int i = -100; i < 100; i++) {
-      p = bigBuf;
-      format("{} {} {} {} {}"
-             "{} {} {} {} {}"
-             "{} {} {} {} {}"
-             "{} {} {} {} {}",
-              i, i+1, i+2, i+3, i+4,
-              i+5, i+6, i+7, i+8, i+9,
-              i+10, i+11, i+12, i+13, i+14,
-              i+15, i+16, i+17, i+18, i+19)(writeToBuf);
-    }
-  }
-}
-
-// Benchmark results on my dev server (dual-CPU Xeon L5520 @ 2.7GHz)
-//
-// ============================================================================
-// folly/test/FormatTest.cpp                         relative  ns/iter  iters/s
-// ============================================================================
-// octal_sprintf                                               100.57     9.94M
-// octal_uintToOctal                                 2599.47%    3.87   258.46M
-// ----------------------------------------------------------------------------
-// hex_sprintf                                                 100.13     9.99M
-// hex_uintToHex                                     3331.75%    3.01   332.73M
-// ----------------------------------------------------------------------------
-// intAppend_sprintf                                           406.07K    2.46K
-// intAppend_to                                       166.03%  244.58K    4.09K
-// intAppend_format                                   147.57%  275.17K    3.63K
-// ----------------------------------------------------------------------------
-// bigFormat_sprintf                                           255.40K    3.92K
-// bigFormat_format                                   102.18%  249.94K    4.00K
-// ============================================================================
-
 int main(int argc, char *argv[]) {
   testing::InitGoogleTest(&argc, argv);
   google::ParseCommandLineFlags(&argc, &argv, true);
-  auto ret = RUN_ALL_TESTS();
-  if (!ret) {
-    runBenchmarksOnFlag();
-  }
-  return ret;
+  return RUN_ALL_TESTS();
 }