Introduce per-isolate cache for compile time constants

runtime/vm/compiler_stats.cc

 // Copyright (c) 2011, 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_stats.h"
 
 #include "vm/flags.h"
 #include "vm/object_graph.h"
 #include "vm/timer.h"
 
@@ skipping 55 matching lines @@
       graphinliner_subst_timer(true, "inliner substitution timer"),
       graphoptimizer_timer(true, "flow graph optimizer timer"),
       graphcompiler_timer(true, "flow graph compiler timer"),
       codefinalizer_timer(true, "code finalization timer"),
       num_tokens_total(0),
       num_literal_tokens_total(0),
       num_ident_tokens_total(0),
       num_tokens_consumed(0),
       num_token_checks(0),
       num_tokens_lookahead(0),
+      num_cached_consts(0),
+      num_const_cache_hits(0),
       num_classes_compiled(0),
       num_functions_compiled(0),
       num_implicit_final_getters(0),
       src_length(0),
       total_code_size(0),
       total_instr_size(0),
       pc_desc_size(0),
       vardesc_size(0) {
 }
 
@@ skipping 18 matching lines @@
   OS::Print("  Literal tokens:   %" Pd64 "\n", num_literal_tokens_total);
   OS::Print("  Ident tokens:     %" Pd64 "\n", num_ident_tokens_total);
   OS::Print("Tokens consumed:    %" Pd64 " (%.2f times number of tokens)\n",
             num_tokens_consumed,
             (1.0 * num_tokens_consumed) / num_tokens_total);
   OS::Print("Tokens checked:     %" Pd64 "  (%.2f times tokens consumed)\n",
             num_token_checks, (1.0 * num_token_checks) / num_tokens_consumed);
   OS::Print("Token lookahead:    %" Pd64 " (%" Pd64 "%% of tokens checked)\n",
             num_tokens_lookahead,
             (100 * num_tokens_lookahead) / num_token_checks);
+  OS::Print("Consts cached:      %" Pd64 "\n", num_cached_consts);
+  OS::Print("Consts cache hits:  %" Pd64 "\n", num_const_cache_hits);
 
   OS::Print("Classes parsed:     %" Pd64 "\n", num_classes_compiled);
   OS::Print("Functions compiled: %" Pd64 "\n", num_functions_compiled);
   OS::Print("  Impl getters:     %" Pd64 "\n", num_implicit_final_getters);
 
   OS::Print("Source length:      %" Pd64 " characters\n", src_length);
   int64_t scan_usecs = scanner_timer.TotalElapsedTime();
   OS::Print("Scanner time:       %" Pd64 " msecs\n",
             scan_usecs / 1000);
   int64_t parse_usecs = parser_timer.TotalElapsedTime();
@@ skipping 43 matching lines @@
             (num_tokens_total * 1024) / total_instr_size);
   OS::Print("Instr size:         %" Pd64 " KB\n",
             total_instr_size / 1024);
   OS::Print("Pc Desc size:       %" Pd64 " KB\n", pc_desc_size / 1024);
   OS::Print("VarDesc size:       %" Pd64 " KB\n", vardesc_size / 1024);
 
   OS::Print("Code size:          %" Pd64 " KB\n", total_code_size / 1024);
 }
 
 }  // namespace dart