Get rid of the "spare buffer" cache.

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 118 matching lines @@
       enabled_cpu_features_(0),
       emit_debug_code_(FLAG_debug_code),
       predictable_code_size_(false),
       // We may use the assembler without an isolate.
       serializer_enabled_(isolate && isolate->serializer_enabled()) {
   if (FLAG_mask_constants_with_cookie && isolate != NULL)  {
     jit_cookie_ = isolate->random_number_generator()->NextInt();
   }
   if (buffer == NULL) {
     // Do our own buffer management.
-    if (buffer_size <= kMinimalBufferSize) {
-      buffer_size = kMinimalBufferSize;
-      if (isolate->assembler_spare_buffer() != NULL) {
-        buffer = isolate->assembler_spare_buffer();
-        isolate->set_assembler_spare_buffer(NULL);
-      }
-    }
-    if (buffer == NULL) buffer = NewArray<byte>(buffer_size);
+    buffer = NewArray<byte>(buffer_size);
     own_buffer_ = true;
   } else {
     // Use externally provided buffer instead.
     DCHECK(buffer_size > 0);
     own_buffer_ = false;
   }
   buffer_ = static_cast<byte*>(buffer);
   buffer_size_ = buffer_size;
 
   pc_ = buffer_;
 }
 
 
 AssemblerBase::~AssemblerBase() {
-  if (own_buffer_) {
-    if (isolate() != NULL &&
-        isolate()->assembler_spare_buffer() == NULL &&
-        buffer_size_ == kMinimalBufferSize) {
-      isolate()->set_assembler_spare_buffer(buffer_);
-    } else {
-      DeleteArray(buffer_);
-    }
-  }
+  if (own_buffer_) DeleteArray(buffer_);
 }
 
 
 // -----------------------------------------------------------------------------
 // Implementation of PredictableCodeSizeScope
 
 PredictableCodeSizeScope::PredictableCodeSizeScope(AssemblerBase* assembler,
                                                    int expected_size)
     : assembler_(assembler),
       expected_size_(expected_size),
@@ skipping 1436 matching lines @@
       r2 = r2 - ad;
     }
     delta = ad - r2;
   } while (q1 < delta || (q1 == delta && r1 == 0));
   int32_t mul = static_cast<int32_t>(q2 + 1);
   multiplier_ = (d < 0) ? -mul : mul;
   shift_ = p - 32;
 }
 
 } }  // namespace v8::internal