Add interface for querying downstream compiler time (#2127)

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/source/slang/slang-compiler.cpp b/source/slang/slang-compiler.cpp
index 0e2f339a9..65a18104e 100644
--- a/source/slang/slang-compiler.cpp
+++ b/source/slang/slang-compiler.cpp
@@ -1365,8 +1365,12 @@ namespace Slang
 
         // Compile
         RefPtr<DownstreamCompileResult> downstreamCompileResult;
+        auto downstreamStartTime = std::chrono::high_resolution_clock::now();
         SLANG_RETURN_ON_FAIL(compiler->compile(options, downstreamCompileResult));
-        
+        auto downstreamElapsedTime =
+            (std::chrono::high_resolution_clock::now() - downstreamStartTime).count() * 0.000000001;
+        slangRequest->getSession()->addDownstreamCompileTime(downstreamElapsedTime);
+
         const auto& diagnostics = downstreamCompileResult->getDiagnostics();
 
         if (diagnostics.diagnostics.getCount())