[SR] Use std::vector::reserve in GetLivenessMap (#68884)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68884
This diff uses std::vector::reserve in GetLivenessMap to set container capacity for all local contains to avoid runtime resizing.
The changes should theoretically improves the performance by a little.
Test Plan:
- [x] `buck run //caffe2/benchmarks/static_runtime:static_runtime_cpptest -- -v 1`
- [x]
```
seq 1 10 | xargs -I{} ./buck-out/opt/gen/caffe2/caffe2/fb/predictor/ptvsc2_predictor_bench \
--scripted_model=/data/users/dxd/302008423_0.predictor.disagg.local \
--method_name=local_request_only.forward --pt_cleanup_activations=1 \
--pt_enable_out_variant=1 --pt_optimize_memory=1 --iters=0 --warmup_iters=0 \
--num_threads=1 --pt_enable_static_runtime=1 --set_compatibility=1 \
--input_type="recordio" --pt_inputs=/data/users/dxd/302008423_0.local_ro.inputs.recordio \
--recordio_use_ivalue_format=1
```
### Before
```
I1201 12:04:46.753311 2874563 PyTorchPredictorBenchLib.cpp:336] Took 10.9826 sec to initialize a predictor.
I1201 12:05:00.617139 2875780 PyTorchPredictorBenchLib.cpp:336] Took 11.1078 sec to initialize a predictor.
I1201 12:05:15.279667 2876813 PyTorchPredictorBenchLib.cpp:336] Took 11.7979 sec to initialize a predictor.
I1201 12:05:30.201207 2877554 PyTorchPredictorBenchLib.cpp:336] Took 11.8901 sec to initialize a predictor.
I1201 12:05:44.386926 2879713 PyTorchPredictorBenchLib.cpp:336] Took 11.2722 sec to initialize a predictor.
I1201 12:05:58.003582 2881426 PyTorchPredictorBenchLib.cpp:336] Took 10.8046 sec to initialize a predictor.
I1201 12:06:12.004778 2882604 PyTorchPredictorBenchLib.cpp:336] Took 11.2754 sec to initialize a predictor.
I1201 12:06:26.101241 2884888 PyTorchPredictorBenchLib.cpp:336] Took 11.3355 sec to initialize a predictor.
I1201 12:06:40.364817 2886572 PyTorchPredictorBenchLib.cpp:336] Took 11.401 sec to initialize a predictor.
I1201 12:06:54.483794 2888614 PyTorchPredictorBenchLib.cpp:336] Took 11.3498 sec to initialize a predictor.
```
### After
```
I1201 11:51:53.775239 2818391 PyTorchPredictorBenchLib.cpp:336] Took 10.9113 sec to initialize a predictor.
I1201 11:52:07.412720 2819530 PyTorchPredictorBenchLib.cpp:336] Took 10.8413 sec to initialize a predictor.
I1201 11:52:21.202816 2820359 PyTorchPredictorBenchLib.cpp:336] Took 11.0216 sec to initialize a predictor.
I1201 11:52:35.513288 2821029 PyTorchPredictorBenchLib.cpp:336] Took 11.4216 sec to initialize a predictor.
I1201 11:52:49.145979 2821930 PyTorchPredictorBenchLib.cpp:336] Took 10.8272 sec to initialize a predictor.
I1201 11:53:02.908790 2822859 PyTorchPredictorBenchLib.cpp:336] Took 11.0262 sec to initialize a predictor.
I1201 11:53:16.276015 2823657 PyTorchPredictorBenchLib.cpp:336] Took 10.6893 sec to initialize a predictor.
I1201 11:53:30.103283 2824382 PyTorchPredictorBenchLib.cpp:336] Took 11.1854 sec to initialize a predictor.
I1201 11:53:44.298514 2825365 PyTorchPredictorBenchLib.cpp:336] Took 11.4796 sec to initialize a predictor.
I1201 11:53:58.258708 2826128 PyTorchPredictorBenchLib.cpp:336] Took 11.2652 sec to initialize a predictor.
```
Reviewed By: swolchok
Differential Revision: D32649252
fbshipit-source-id: 5cd296d12b12e5b15e85e4f1a8a236e293f37f9c
