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308a1af6ab
This adds more indexes to the kernel format so we know where classes and procedures starts and stops. This allows for more random access. E.g. one could now read the program index and jump directly to library $i_1$, then read the library index and jump directly to class $i_2$, read the class index and jump directly to procedure $i_3$. The utilization (in this CL) is to not (always) read the procedure body up front when loading kernel code on the dart side (ast_from_binary). The observation is that - when running through the VM - almost none of the bodies from the platform file are actually used. This lowers the start-up cost which is noticeable for small programs (e.g. hello world, or tests). In this CL this is only done on the dart side and not on the C++ side, that's for another CL. Startup time: dart2js: -1.84253% +/- 1.22157% hello world: -11.1188% +/- 5.57892% Running "time python tools/test.py -m release -cdartk language -j6": real: -11.72% +/- 0.35% user: -14.59% +/- 0.24% sys: -12.71% +/- 0.61% File size change (compiling with fasta to dill file incl. platform): hello world: 0.88% (35,934 bytes). dart2js: 0.97% (200,967 bytes). Change-Id: I1f0ec121bc75bb17f11d3fade03da9815037d0bb Reviewed-on: https://dart-review.googlesource.com/5262 Reviewed-by: Kevin Millikin <kmillikin@google.com> |
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| lib | ||
| observatory | ||
| platform | ||
| tests/vm | ||
| third_party | ||
| tools | ||
| vm | ||
| .gitignore | ||
| BUILD.gn | ||
| codereview.settings | ||
| CPPLINT.cfg | ||
| PRESUBMIT.py | ||
| runtime_args.gni | ||