Added formatter becnhmarks

bench/formatter-bench.cpp

@@ -0,0 +1,100 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include "benchmark/benchmark.h"
+
+#include "spdlog/spdlog.h"
+#include "spdlog/details/pattern_formatter.h"
+
+void bench_scoped_pad(benchmark::State &state, size_t wrapped_size, spdlog::details::padding_info padinfo)
+{
+    fmt::memory_buffer dest;
+    for (auto _ : state)
+    {
+        {
+            spdlog::details::scoped_pad p(wrapped_size, padinfo, dest);
+            benchmark::DoNotOptimize(p);
+            dest.clear();
+        }
+    }
+}
+
+
+void bench_formatter(benchmark::State &state, std::string pattern)
+{
+    auto formatter = spdlog::details::make_unique<spdlog::pattern_formatter>(pattern);
+    fmt::memory_buffer dest;
+    std::string logger_name = "logger-name";
+    const char* text = "Hello. This is some message with length of 80                                   ";
+
+
+    spdlog::details::log_msg msg(&logger_name, spdlog::level::info, text);
+//    formatter->format(msg, dest);
+//    printf("%s\n", fmt::to_string(dest).c_str());
+
+    for (auto _ : state)
+    {
+        dest.clear();
+        formatter->format(msg, dest);
+        benchmark::DoNotOptimize(dest);
+    }
+}
+
+void bench_formatters()
+{
+    // basic patterns(single flag)
+    std::string all_flags = "+vtPnlLaAbBcCYDmdHIMSefFprRTXzEi%";
+    std::vector<std::string> basic_patterns;
+    for(auto &flag:all_flags)
+    {
+        auto pattern = std::string("%") + flag;
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+
+    }
+
+    // complex patterns
+    std::vector<std::string> patterns = {
+            "[%D %X] [%l] [%n] %v",
+            "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] %v",
+            "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] [%t] %v",
+    };
+    for(auto &pattern:patterns)
+    {
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+    }
+}
+
+void bench_padders()
+{
+    using spdlog::details::padding_info;
+    std::vector<size_t> sizes = {0, 2, 4, 8, 16, 32, 64, 128};
+
+    for (auto size : sizes)
+    {
+        size_t wrapped_size = 8;
+        size_t padding_size = wrapped_size + size;
+
+        std::string title = "scoped_pad::left::" + std::to_string(size);
+
+        benchmark::RegisterBenchmark(title.c_str(), bench_scoped_pad, wrapped_size, padding_info(padding_size, padding_info::left));
+
+        title = "scoped_pad::right::" + std::to_string(size);
+        benchmark::RegisterBenchmark(title.c_str(), bench_scoped_pad, wrapped_size, padding_info(padding_size, padding_info::right));
+
+        title = "scoped_pad::center::" + std::to_string(size);
+        benchmark::RegisterBenchmark(title.c_str(), bench_scoped_pad, wrapped_size, padding_info(padding_size, padding_info::center));
+    }
+}
+
+
+
+int main(int argc, char *argv[])
+{
+    bench_formatters();
+    //bench_padders();
+    benchmark::Initialize(&argc, argv);
+    benchmark::RunSpecifiedBenchmarks();
+}
+