Perf improvements to IR serialization (#7751)

* option to use riff as serialization backend

* option to use riff as serialization backend

* perf

* shuffle code

* perf improvements to deserialization

* formatting

* remove bit_cast

* correct IR verification

* neaten serialized format

* fix peek module info

* formatting

* remove temporary profiling code

* cleanup

* fix wasm build

* more explicit sizes

* deserialize via fossil on 32 bit wasm

* Make serialized modules Int size agnostic

* reorder stable names to allow range based check for 64 bit constants

* format

* review comments

* fix build

* fix

* c++17 compat slang-common.h

1 files changed, 14 insertions, 7 deletions

diff --git a/source/core/slang-performance-profiler.cpp b/source/core/slang-performance-profiler.cpp
index 9bc532680..bd046f4cc 100644
--- a/source/core/slang-performance-profiler.cpp
+++ b/source/core/slang-performance-profiler.cpp
@@ -35,15 +35,22 @@ public:
         char buffer[512];
         for (const auto& func : data)
         {
-            memset(buffer, 0, sizeof(buffer));
-            snprintf(buffer, sizeof(buffer), "[*] %30s", func.key);
-            out << buffer << " \t";
-            auto milliseconds =
-                std::chrono::duration_cast<std::chrono::milliseconds>(func.value.duration);
-            out << func.value.invocationCount << " \t"
-                << static_cast<uint64_t>(milliseconds.count()) << "ms\n";
+            auto microseconds =
+                std::chrono::duration_cast<std::chrono::microseconds>(func.value.duration);
+            double milliseconds = microseconds.count() / 1000.0;
+            snprintf(
+                buffer,
+                sizeof(buffer),
+                "[*] %30s \t%d \t%8.2fms\n",
+                func.key,
+                func.value.invocationCount,
+                milliseconds);
+
+            out << buffer;
         }
     }
+
+
     virtual void clear() override { data.clear(); }
     virtual void dispose() override { data = decltype(data)(); }
 };