1 files changed, 23 insertions, 0 deletions
diff --git a/absl/strings/numbers_benchmark.cc b/absl/strings/numbers_benchmark.cc
index 54dbedd35357..6e79b3e811ff 100644
--- a/absl/strings/numbers_benchmark.cc
+++ b/absl/strings/numbers_benchmark.cc
@@ -20,6 +20,8 @@
 
 #include "benchmark/benchmark.h"
 #include "absl/base/internal/raw_logging.h"
+#include "absl/random/distributions.h"
+#include "absl/random/random.h"
 #include "absl/strings/numbers.h"
 
 namespace {
@@ -260,4 +262,25 @@ BENCHMARK_TEMPLATE(BM_SimpleAtod, std::string)
     ->ArgPair(10, 4)
     ->ArgPair(10, 8);
 
+void BM_FastHexToBufferZeroPad16(benchmark::State& state) {
+  absl::BitGen rng;
+  std::vector<uint64_t> nums;
+  nums.resize(1000);
+  auto min = std::numeric_limits<uint64_t>::min();
+  auto max = std::numeric_limits<uint64_t>::max();
+  for (auto& num : nums) {
+    num = absl::LogUniform(rng, min, max);
+  }
+
+  char buf[16];
+  while (state.KeepRunningBatch(nums.size())) {
+    for (auto num : nums) {
+      auto digits = absl::numbers_internal::FastHexToBufferZeroPad16(num, buf);
+      benchmark::DoNotOptimize(digits);
+      benchmark::DoNotOptimize(buf);
+    }
+  }
+}
+BENCHMARK(BM_FastHexToBufferZeroPad16);
+
 }  // namespace