Subzero. Moar performance tweaks.

src/main.cpp

Index: src/main.cpp
diff --git a/src/main.cpp b/src/main.cpp
index 9e2a6ecf32d6f5f7d31c97162d457ddc2c6816fe..a755e89870e2c4c464c25b733eecd3c85bcd7ea6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -17,6 +17,10 @@
 #include "IceBuildDefs.h"
 #include "IceCompileServer.h"
 
+#ifdef __pnacl__
+#include <malloc.h>
+#endif // __pnacl__
+
 /// Depending on whether we are building the compiler for the browser or
 /// standalone, we will end up creating a Ice::BrowserCompileServer or
 /// Ice::CLCompileServer object. Method
@@ -26,6 +30,12 @@
 /// We can only compile the Ice::BrowserCompileServer object with the PNaCl
 /// compiler toolchain, when building Subzero as a sandboxed translator.
 int main(int argc, char **argv) {
+#ifdef __pnacl__

[sehr, 2016/02/26 03:27:39]

Comment here that the pnacl implementation of malloc makes a lot of calls to
mmap and hence causes significant slowdowns.

[John, 2016/02/26 15:15:50]

Done.

+#define M_GRANULARITY (-2)
+  mallopt(M_GRANULARITY, 16 * 1024 * 1024);
+#undef M_GRANULARITY
+#endif // __pnacl__
+
   if (Ice::BuildDefs::browser()) {
     assert(argc == 1);
     return Ice::BrowserCompileServer().runAndReturnErrorCode();