When running compile-all, clear code after compiling so that we do not out too much pressure on GC …

runtime/vm/compiler.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 852 matching lines @@
   for (int i = 0; i < functions.Length(); i++) {
     func ^= functions.At(i);
     ASSERT(!func.IsNull());
     if (!func.HasCode() &&
         !func.is_abstract() &&
         !func.IsRedirectingFactory()) {
       error = CompileFunction(func);
       if (!error.IsNull()) {
         return error.raw();
       }
+      func.ClearCode();
     }
   }
   // Inner functions get added to the closures array. As part of compilation
   // more closures can be added to the end of the array. Compile all the
   // closures until we have reached the end of the "worklist".
   GrowableObjectArray& closures =
       GrowableObjectArray::Handle(cls.closures());
   if (!closures.IsNull()) {
     for (int i = 0; i < closures.Length(); i++) {
       func ^= closures.At(i);
       if (!func.HasCode()) {
         error = CompileFunction(func);
         if (!error.IsNull()) {
           return error.raw();
         }
+        func.ClearCode();
       }
     }
   }
   return error.raw();
 }
 
 
 RawObject* Compiler::ExecuteOnce(SequenceNode* fragment) {
   Isolate* isolate = Isolate::Current();
   LongJumpScope jump;
@@ skipping 44 matching lines @@
     const Object& result =
       Object::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart