[Doc] Add benchmarking notes

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fanquake 2016-05-27 16:01:14 +08:00
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@ -57,6 +57,7 @@ The Bitcoin repo's [root README](/README.md) contains relevant information on th
- [Shared Libraries](shared-libraries.md)
- [BIPS](bips.md)
- [Dnsseed Policy](dnsseed-policy.md)
- [Benchmarking](benchmarking.md)
### Resources
* Discuss on the [BitcoinTalk](https://bitcointalk.org/) forums, in the [Development & Technical Discussion board](https://bitcointalk.org/index.php?board=6.0).

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Benchmarking
============
Bitcoin Core has an internal benchmarking framework, with benchmarks
for cryptographic algorithms such as SHA1, SHA256, SHA512 and RIPEMD160. As well as the rolling bloom filter.
After compiling bitcoin-core, the benchmarks can be run with:
`src/bench/bench_bitcoin`
The output will look similar to:
```
#Benchmark,count,min,max,average
RIPEMD160,448,0.001245033173334,0.002638196945190,0.002461894814457
RollingBloom-refresh,1,0.000635000000000,0.000635000000000,0.000635000000000
RollingBloom-refresh,1,0.000108000000000,0.000108000000000,0.000108000000000
RollingBloom-refresh,1,0.000107000000000,0.000107000000000,0.000107000000000
RollingBloom-refresh,1,0.000204000000000,0.000204000000000,0.000204000000000
SHA1,640,0.000909024336207,0.001938136418660,0.001843086257577
SHA256,256,0.002209486499909,0.008500099182129,0.004300644621253
SHA512,384,0.001319904176016,0.002813005447388,0.002615700786312
Sleep100ms,10,0.205592155456543,0.210056066513062,0.104166316986084
Trig,67108864,0.000000014997003,0.000000015448112,0.000000015188842
```
More benchmarks are needed for, in no particular order:
- Script Validation
- CCoinDBView caching
- Coins database
- Memory pool
- Wallet coin selection