Add basic printf benchmarks.

Bug: http://b/67371539
Test: ran benchmarks
Change-Id: I6ad05540079776b2df4cc8d9c02440c61e42037d

2 files changed, 34 insertions, 0 deletions

diff --git a/benchmarks/stdio_benchmark.cpp b/benchmarks/stdio_benchmark.cpp
index 0e7f668f3..97a03dc32 100644
--- a/benchmarks/stdio_benchmark.cpp
+++ b/benchmarks/stdio_benchmark.cpp
@@ -171,3 +171,28 @@ void BM_stdio_fopen_fgetc_fclose_no_locking(benchmark::State& state) {
   FopenFgetcFclose(state, true);
 }
 BIONIC_BENCHMARK(BM_stdio_fopen_fgetc_fclose_no_locking);
+
+static void BM_stdio_printf_literal(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    char buf[BUFSIZ];
+    snprintf(buf, sizeof(buf), "this is just a literal string with no format specifiers");
+  }
+}
+BIONIC_BENCHMARK(BM_stdio_printf_literal);
+
+static void BM_stdio_printf_s(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    char buf[BUFSIZ];
+    snprintf(buf, sizeof(buf), "this is a more typical error message with detail: %s",
+             "No such file or directory");
+  }
+}
+BIONIC_BENCHMARK(BM_stdio_printf_s);
+
+static void BM_stdio_printf_d(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    char buf[BUFSIZ];
+    snprintf(buf, sizeof(buf), "this is a more typical error message with detail: %d", 123456);
+  }
+}
+BIONIC_BENCHMARK(BM_stdio_printf_d);
diff --git a/benchmarks/suites/full.xml b/benchmarks/suites/full.xml
index a7bd9d468..240b5e79a 100644
--- a/benchmarks/suites/full.xml
+++ b/benchmarks/suites/full.xml
@@ -189,6 +189,15 @@
   <name>BM_stdio_fopen_getline_fclose_no_locking</name>
 </fn>
 <fn>
+  <name>BM_stdio_printf_literal</name>
+</fn>
+<fn>
+  <name>BM_stdio_printf_s</name>
+</fn>
+<fn>
+  <name>BM_stdio_printf_d</name>
+</fn>
+<fn>
   <name>BM_string_memcmp</name>
   <args>AT_ALIGNED_TWOBUF</args>
 </fn>