feat update

src/strings/base64.cc

@@ -1,5 +1,5 @@
-#include "sled/strings/base64.h"
 #include <fmt/format.h>
+#include <sled/strings/base64.h>
 #include <sstream>
 
 namespace sled {

src/strings/base64_bench.cc

@@ -0,0 +1,12 @@
+#include <benchmark/benchmark.h>
+#include <sled/random.h>
+#include <sled/strings/base64.h>
+
+static void
+Base64Encode(benchmark::State &state)
+{
+    std::string input = "hello world\n";
+    for (auto _ : state) { (void) sled::Base64::Encode(input); }
+}
+
+BENCHMARK(Base64Encode)->RangeMultiplier(10)->Range(10, 1000000);