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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
..
check-doc.py test/contrib: Fix invalid escapes in regex strings 2019-09-03 14:38:38 -04:00
check-rpc-mappings.py scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
commit-script-check.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
extended-lint-all.sh scripted-diff: Bump copyright headers 2020-04-16 13:33:09 -04:00
extended-lint-cppcheck.sh scripted-diff: Bump copyright headers 2020-04-16 13:33:09 -04:00
git-subtree-check.sh doc: improve subtree check instructions 2020-06-12 13:31:42 +02:00
lint-all.sh Run all lint scripts 2019-05-16 16:42:59 +02:00
lint-assertions.sh util: Add Assert identity function 2020-06-15 07:39:08 -04:00
lint-circular-dependencies.sh scripted-diff: Bump copyright headers 2020-04-16 13:33:09 -04:00
lint-filenames.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
lint-format-strings.py Refactor: Copy CWallet signals and print function to LegacyScriptPubKeyMan 2020-01-23 16:35:08 -05:00
lint-format-strings.sh scripted-diff: Bump copyright headers 2020-04-16 13:33:09 -04:00
lint-include-guards.sh Replace current benchmarking framework with nanobench 2020-06-13 12:24:18 +02:00
lint-includes.sh gui: change combiner for signals to optional_last_value 2020-07-01 21:40:51 +08:00
lint-locale-dependence.sh Merge #18649: tests: Add std::locale::global to list of locale dependent functions in lint-locale-dependence.sh 2020-07-03 10:42:18 +08:00
lint-logs.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
lint-python-mutable-default-parameters.sh lint: Catch use of [] or {} as default parameter values in Python functions 2019-08-26 10:53:10 +00:00
lint-python-utf8-encoding.sh scripted-diff: Bump copyright headers 2020-04-16 13:33:09 -04:00
lint-python.sh test: Bump linter versions 2020-06-22 20:15:53 +02:00
lint-qt.sh test: Add lint to prevent SIGNAL/SLOT connect style 2018-08-21 09:43:55 +01:00
lint-rpc-help.sh rpc: Documentation fixups 2018-11-15 12:19:11 -05:00
lint-shebang.sh scripted-diff: Bump copyright headers 2020-04-16 13:33:09 -04:00
lint-shell-locale.sh macOS fix: Work around empty (sub)expression error when using BSD grep 2018-08-31 00:52:48 +02:00
lint-shell.sh test: Bump linter versions 2020-06-22 20:15:53 +02:00
lint-spelling.ignore-words.txt Make lint-spelling.py happy 2020-06-19 02:20:04 -07:00
lint-spelling.sh test: Add crc32c exception to various linters and generation scripts 2020-01-28 17:01:48 +01:00
lint-submodule.sh ci: Check for submodules 2020-02-10 16:48:15 +01:00
lint-tests.sh Obsolete #!/bin/bash shebang 2018-06-20 11:12:41 +03:00
lint-whitespace.sh test: Add crc32c exception to various linters and generation scripts 2020-01-28 17:01:48 +01:00
README.md doc: improve subtree check instructions 2020-06-12 13:31:42 +02:00

README.md

This folder contains lint scripts.

check-doc.py

Check for missing documentation of command line options.

commit-script-check.sh

Verification of scripted diffs. Scripted diffs are only assumed to run on the latest LTS release of Ubuntu. Running them on other operating systems might require installing GNU tools, such as GNU sed.

git-subtree-check.sh

Run this script from the root of the repository to verify that a subtree matches the contents of the commit it claims to have been updated to.

To use, make sure that you have fetched the upstream repository branch in which the subtree is maintained:

To do so, add the upstream repository as remote:

git remote add --fetch secp256k1 https://github.com/bitcoin-core/secp256k1.git

Usage: git-subtree-check.sh DIR (COMMIT)

COMMIT may be omitted, in which case HEAD is used.

lint-all.sh

Calls other scripts with the lint- prefix.