[clang-tools-extra] [clang-doc] add ftime profiling (PR #97644)

[Paul Kirth via cfe-commits]

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@@ -362,6 +395,17 @@ Example usage for a project using a compile commands database:
   if (Err) {
     llvm::outs() << "warning: " << toString(std::move(Err)) << "\n";
   }
-
+  llvm::timeTraceProfilerEnd();
+
+  if (FTimeTrace) {
+    std::error_code EC;
+    llvm::raw_fd_ostream OS("clang-doc-tracing.json", EC,
+                            llvm::sys::fs::OF_Text);
+    if (!EC) {
+      llvm::timeTraceProfilerWrite(OS);
+    } else {
+      llvm::errs() << "Error opening file: " << EC.message() << "\n";
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ilovepi wrote:

shouldn't we be returning an error value from main here?

https://github.com/llvm/llvm-project/pull/97644