From: Jeremy Lilley <jeremyl@fb.com>
Date: Thu, 9 Aug 2012 16:57:22 +0000 (-0700)
Subject: Add "short append" benchmark to fbstring benchmark suite.
X-Git-Tag: v0.22.0~1218
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=be7be7e244159b84c0a28d8082ef06f81cac83bc;p=folly.git

Add "short append" benchmark to fbstring benchmark suite.

Summary:
Appending many small strings to fbstring appears much slower (~3x) vs.
std::string. Adding benchmark case to illustrate.

[If this isn't wanted, I can revert]

Test Plan: This is a benchmark.

Reviewed By: soren@fb.com

FB internal diff: D544159
---

diff --git a/folly/test/FBStringTestBenchmarks.cpp.h b/folly/test/FBStringTestBenchmarks.cpp.h
index 15ddc650..1e29ed29 100644
--- a/folly/test/FBStringTestBenchmarks.cpp.h
+++ b/folly/test/FBStringTestBenchmarks.cpp.h
@@ -222,3 +222,14 @@ BENCHMARK_PARAM(BENCHFUN(push_back), 1);
 BENCHMARK_PARAM(BENCHFUN(push_back), 23);
 BENCHMARK_PARAM(BENCHFUN(push_back), 127);
 BENCHMARK_PARAM(BENCHFUN(push_back), 1024);
+
+void BENCHFUN(short_append)(int iters, int arg) {
+  FOR_EACH_RANGE (i, 0, iters) {
+    STRING s;
+    FOR_EACH_RANGE (j, 0, arg) {
+      s += "012";
+    }
+  }
+}
+BENCHMARK_PARAM(BENCHFUN(short_append), 23);
+BENCHMARK_PARAM(BENCHFUN(short_append), 1024);