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25 lines
1.8 KiB
Markdown
25 lines
1.8 KiB
Markdown
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# Benchmarks for Prysm State Transition
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This package contains the functionality needed for benchmarking Prysms state transitions, this includes its block processing (with and without caching) and epoch processing functions. There is also a benchmark for HashTreeRoot on a large beacon state.
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## Benchmark Configuration
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The following configs are in `config.go`:
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* `ValidatorCount`: Sets the amount of active validators to perform the benchmarks with. Default is 65536.
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* `AttestationsPerEpoch`: Sets the amount of attestations per epoch for the benchmarks to perform with, this affects the amount of attestations in a full block and the amount of attestations per epoch in the state for the `ProcessEpoch` and `HashTreeRoot` benchmark. Default is 128.
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## Generating new SSZ files
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Due to the sheer size of the benchmarking configurations (65536 validators), the files used for benchmarking are pregenerated so there's no wasted computations on generating a genesis state with 65536 validators. This should only be needed if there is a breaking spec change and the tests fail from SSZ issues.
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To generate new files to use for benchmarking, run the below command in the root of Prysm.
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```
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go run beacon-chain/core/state/benchmarks/benchmark_files/generate_bench_files.go
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```
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Bazel does not allow writing to the project directory, so running with `go run` is needed.
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## Current Results as of November 2019
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```
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BenchmarkExecuteStateTransition-4 25 35901941409 ns/op 7465058127 B/op 111046635 allocs/op
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BenchmarkExecuteStateTransition_WithCache-4 25 24352836461 ns/op 716078697 B/op 22348530 allocs/op
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BenchmarkProcessEpoch_2FullEpochs-4 5 177559078808 ns/op 12754314974 B/op 176571470 allocs/op
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BenchmarkHashTreeRoot_FullState-4 50 1321382095 ns/op 253959577 B/op 9645648 allocs/op
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```
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