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Wladimir J. van der Laan 4ebe2f6e75
Merge #18011: Replace current benchmarking framework with nanobench 
78c312c983 Replace current benchmarking framework with nanobench (Martin Ankerl)

Pull request description:

  Replace current benchmarking framework with nanobench

  This replaces the current benchmarking framework with nanobench [1], an
  MIT licensed single-header benchmarking library, of which I am the
  autor. This has in my opinion several advantages, especially on Linux:

  * fast: Running all benchmarks takes ~6 seconds instead of 4m13s on
    an Intel i7-8700 CPU @ 3.20GHz.

  * accurate: I ran e.g. the benchmark for SipHash_32b 10 times and
    calculate standard deviation / mean = coefficient of variation:

    * 0.57% CV for old benchmarking framework
    * 0.20% CV for nanobench

    So the benchmark results with nanobench seem to vary less than with
    the old framework.

  * It automatically determines runtime based on clock precision, no need
    to specify number of evaluations.

  * measure instructions, cycles, branches, instructions per cycle,
    branch misses (only Linux, when performance counters are available)

  * output in markdown table format.

  * Warn about unstable environment (frequency scaling, turbo, ...)

  * For better profiling, it is possible to set the environment variable
    NANOBENCH_ENDLESS to force endless running of a particular benchmark
    without the need to recompile. This makes it to e.g. run "perf top"
    and look at hotspots.

  Here is an example copy & pasted from the terminal output:

  |             ns/byte |              byte/s |    err% |        ins/byte |        cyc/byte |    IPC |       bra/byte |   miss% |     total | benchmark
  |--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
  |                2.52 |      396,529,415.94 |    0.6% |           25.42 |            8.02 |  3.169 |           0.06 |    0.0% |      0.03 | `bench/crypto_hash.cpp RIPEMD160`
  |                1.87 |      535,161,444.83 |    0.3% |           21.36 |            5.95 |  3.589 |           0.06 |    0.0% |      0.02 | `bench/crypto_hash.cpp SHA1`
  |                3.22 |      310,344,174.79 |    1.1% |           36.80 |           10.22 |  3.601 |           0.09 |    0.0% |      0.04 | `bench/crypto_hash.cpp SHA256`
  |                2.01 |      496,375,796.23 |    0.0% |           18.72 |            6.43 |  2.911 |           0.01 |    1.0% |      0.00 | `bench/crypto_hash.cpp SHA256D64_1024`
  |                7.23 |      138,263,519.35 |    0.1% |           82.66 |           23.11 |  3.577 |           1.63 |    0.1% |      0.00 | `bench/crypto_hash.cpp SHA256_32b`
  |                3.04 |      328,780,166.40 |    0.3% |           35.82 |            9.69 |  3.696 |           0.03 |    0.0% |      0.03 | `bench/crypto_hash.cpp SHA512`

  [1] https://github.com/martinus/nanobench

ACKs for top commit:
  laanwj:
    ACK 78c312c983

Tree-SHA512: 9e18770b18b6f95a7d0105a4a5497d31cf4eb5efe6574f4482f6f1b4c88d7e0946b9a4a1e9e8e6ecbf41a3f2d7571240677dcb45af29a6f0584e89b25f32e49e
2020-07-30 15:34:17 +02:00
..
man doc: remove OpenSSL from build instructions and licensing info 2019-11-18 08:56:48 -05:00
release-notes doc: Add release-notes-0.20.0.md 2020-06-02 18:16:51 -04:00
.gitignore
assets-attribution.md
benchmarking.md Replace current benchmarking framework with nanobench 2020-06-13 12:24:18 +02:00
bips.md doc: Update doc/bips.md with recent changes in master 2019-11-05 10:20:16 -05:00
bitcoin-conf.md
bitcoin_logo_doxygen.png
build-freebsd.md doc: mention MAKE=gmake workaround when building on a BSD 2020-03-18 07:55:07 +08:00
build-netbsd.md doc: mention MAKE=gmake workaround when building on a BSD 2020-03-18 07:55:07 +08:00
build-openbsd.md doc: mention MAKE=gmake workaround when building on a BSD 2020-03-18 07:55:07 +08:00
build-osx.md Merge #18070: doc: add note about brew doctor 2020-02-20 20:56:41 +08:00
build-unix.md doc: remove Boost Chrono from install docs 2020-03-07 08:34:31 +08:00
build-windows.md Add Windows WSL build recommendation to temporarily disable Win32 PE support. 2020-06-29 13:25:59 +01:00
dependencies.md build: Set libevent minimum version to 2.0.21 2020-04-17 13:53:34 +03:00
descriptors.md Output a descriptor in createmultisig and addmultisigaddress 2020-01-30 23:55:36 -05:00
developer-notes.md Merge #19258: doc: improve subtree check instructions 2020-07-09 17:52:54 +02:00
dnsseed-policy.md
Doxyfile.in test: Add crc32c exception to various linters and generation scripts 2020-01-28 17:01:48 +01:00
files.md Add <datadir>/settings.json persistent settings storage. 2020-07-11 05:41:12 -04:00
fuzzing.md doc: afl fuzzing comment about afl-gcc and afl-g++ 2020-07-05 20:55:11 -04:00
gitian-building.md
init.md fixing documentation to not require rpcpassword 2020-03-21 19:51:31 +05:30
JSON-RPC-interface.md
multiprocess.md build: multiprocess autotools changes 2020-05-12 09:47:06 -04:00
productivity.md doc: Drop protobuf stuff 2020-05-23 10:14:18 +03:00
psbt.md
README.md doc: Update webchat URLs in README.md 2020-04-02 13:09:55 +00:00
README_doxygen.md
README_windows.txt
reduce-memory.md doc: block-relay-only is not blocksonly 2020-03-30 09:09:12 -04:00
reduce-traffic.md doc: Use precise permission flags where possible 2020-07-10 15:37:42 +02:00
release-notes-16525.md
release-notes.md gui, doc: rm Ban Score in GUI Peers window/release notes updates 2020-07-14 10:18:17 +02:00
release-process.md [doc] fix git add argument 2020-04-03 12:52:36 +02:00
REST-interface.md Merge #19390: doc/REST-interface: Remove stale info 2020-06-29 13:32:01 +08:00
shared-libraries.md
tor.md
translation_process.md
translation_strings_policy.md doc: Do not translate technical or extremely rare errors 2020-05-05 04:46:08 +03:00
zmq.md Add a link from ZMQ doc to ZMQ example in contrib/ 2020-05-12 16:06:28 +08:00

README.md

Bitcoin Core

Setup

Bitcoin Core is the original Bitcoin client and it builds the backbone of the network. It downloads and, by default, stores the entire history of Bitcoin transactions, which requires a few hundred gigabytes of disk space. Depending on the speed of your computer and network connection, the synchronization process can take anywhere from a few hours to a day or more.

To download Bitcoin Core, visit bitcoincore.org.

Running

The following are some helpful notes on how to run Bitcoin Core on your native platform.

Unix

Unpack the files into a directory and run:

  • bin/bitcoin-qt (GUI) or
  • bin/bitcoind (headless)

Windows

Unpack the files into a directory, and then run bitcoin-qt.exe.

macOS

Drag Bitcoin Core to your applications folder, and then run Bitcoin Core.

Need Help?

Building

The following are developer notes on how to build Bitcoin Core on your native platform. They are not complete guides, but include notes on the necessary libraries, compile flags, etc.

Development

The Bitcoin repo's root README contains relevant information on the development process and automated testing.

Resources

Miscellaneous

License

Distributed under the MIT software license.