plot_test.cc tests performance

chenshuo · Jan 31, 2015 · 9a65a49 · 9a65a49
1 parent 58fa73c
commit 9a65a49
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/examples/procmon/plot_test.cc b/examples/procmon/plot_test.cc
@@ -1,4 +1,5 @@
 #include "plot.h"
+#include <muduo/base/Timestamp.h>
 #include <vector>
 #include <math.h>
 #include <stdio.h>
@@ -8,10 +9,18 @@ int main()
   std::vector<double> cpu_usage;
   for (int i = 0; i < 300; ++i)
     cpu_usage.push_back(1.0 + sin(pow(i / 30.0, 2)));
-  Plot plot(600, 100, 600, 2);
+  Plot plot(640, 100, 600, 2);
+  muduo::Timestamp start(muduo::Timestamp::now());
+  const int N = 10000;
+  for (int i = 0; i < N; ++i)
+    muduo::string png = plot.plotCpu(cpu_usage);
+  double elapsed = timeDifference(muduo::Timestamp::now(), start);
+  printf("%d plots in %f seconds, %f PNG per second, %f ms per PNG\n",
+         N, elapsed, N / elapsed, elapsed * 1000 / N);
   muduo::string png = plot.plotCpu(cpu_usage);
 
   FILE* fp = fopen("test.png", "wb");
   fwrite(png.data(), 1, png.size(), fp);
   fclose(fp);
+  printf("Image saved to test.png\n");
 }
diff --git a/examples/procmon/procmon.cc b/examples/procmon/procmon.cc
@@ -427,6 +427,7 @@ class Procmon : boost::noncopyable
   Buffer response_;
 };
 
+// define outline for __attribute__
 int Procmon::appendResponse(const char* fmt, ...)
 {
   char buf[1024];