Add ScopedPerfTimer

src/clang_complete.cc

@@ -479,6 +479,7 @@ void CompletionQueryMain(ClangCompleteManager* completion_manager) {
       // TODO: before emitting diagnostics check if we have another completion
       // request and think about servicing that first, because it may be much
       // faster than reparsing the document.
+      // TODO: have a separate thread for diagnostics?
 
       timer.Reset();
       session->tu =

src/messages/text_document_completion.cc

@@ -3,6 +3,7 @@
 #include "include_complete.h"
 #include "message_handler.h"
 #include "queue_manager.h"
+#include "timer.h"
 #include "working_files.h"
 
 #include "lex_utils.h"
@@ -101,6 +102,8 @@ char* tofixedbase64(T input, char* out) {
 void SortAndFilterCompletionResponse(
     Out_TextDocumentComplete* complete_response,
     const std::string& complete_text) {
+  ScopedPerfTimer timer("SortAndFilterCompletionResponse");
+
 // Used to inject more completions.
 #if false
   const size_t kNumIterations = 250;

src/timer.cc

@@ -55,3 +55,10 @@ void Timer::Resume() {
   assert(!start_.has_value());
   start_ = Clock::now();
 }
+
+ScopedPerfTimer::ScopedPerfTimer(const std::string& message) : message_(message) {}
+
+ScopedPerfTimer::~ScopedPerfTimer() {
+  timer_.ResetAndPrint(message_);
+}
+

src/timer.h

@@ -29,3 +29,11 @@ struct Timer {
   // Elapsed time.
   long long elapsed_ = 0;
 };
+
+struct ScopedPerfTimer {
+  ScopedPerfTimer(const std::string& message);
+  ~ScopedPerfTimer();
+
+  Timer timer_;
+  std::string message_;
+};