[profiler] Avoid allocating ~2 MB of handles when processing the sample buffer.

runtime/vm/object.h

 // 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.
 
 #ifndef RUNTIME_VM_OBJECT_H_
 #define RUNTIME_VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 4674 matching lines @@
   }
 
   bool is_optimized() const {
     return OptimizedBit::decode(raw_ptr()->state_bits_);
   }
   void set_is_optimized(bool value) const;
   bool is_alive() const { return AliveBit::decode(raw_ptr()->state_bits_); }
   void set_is_alive(bool value) const;
 
   uword PayloadStart() const {
-    const Instructions& instr = Instructions::Handle(instructions());
-    return instr.PayloadStart();
+    return Instructions::PayloadStart(instructions());
   }
   uword UncheckedEntryPoint() const {
     const Instructions& instr = Instructions::Handle(instructions());
     return instr.UncheckedEntryPoint();
   }
   uword CheckedEntryPoint() const {
     const Instructions& instr = Instructions::Handle(instructions());
     return instr.CheckedEntryPoint();
   }
-  intptr_t Size() const {
-    const Instructions& instr = Instructions::Handle(instructions());
-    return instr.Size();
-  }
+  intptr_t Size() const { return Instructions::Size(instructions()); }
   RawObjectPool* GetObjectPool() const { return object_pool(); }
   bool ContainsInstructionAt(uword addr) const {
     const Instructions& instr = Instructions::Handle(instructions());
     const uword offset = addr - instr.PayloadStart();
     return offset < static_cast<uword>(instr.Size());
   }
 
   // Returns true if there is a debugger breakpoint set in this code object.
   bool HasBreakpoint() const;
 
@@ skipping 4302 matching lines @@
 
 inline void TypeArguments::SetHash(intptr_t value) const {
   // This is only safe because we create a new Smi, which does not cause
   // heap allocation.
   StoreSmi(&raw_ptr()->hash_, Smi::New(value));
 }
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_OBJECT_H_