This directory contains tests and related utilities to monitor Julia's performance over time. The results are presented on http:https://speed.julialang.org/.

In test/perf run make. It will run the perf.jl script in all the sub-directories and display the test name with the minimum, maximum, mean and standard deviation of the wall-time of five repeated test runs in micro seconds.

Calling make codespeed is for generating the results displayed on http:https://speed.julialang.org/, probably not what you want.

There is also a perfcomp.jl script but it may not be working with the rest at the moment.

First decide whether the new tests should go into one of the existing suites:

• micro: A set of micro-benchmarks commonly used to compare programming languages; these results are shown on http:https://julialang.org/.
• blas, lapack: Performance tests for linear algebra tasks from low-level operations such as matrix multiplies to higher-level operations like eigenvalue problems.
• cat: Performance tests for concatenation of vectors and matrices.
• kernel: Performance tests used to track real-world code examples that previously ran slowly.
• shootout Tracks the performance of tests taken from the Computer Language Benchmarks Game performance tests.
• sort: Performance tests of sorting algorithms.
• spell Performance tests of Peter Norvig's spelling corrector.
• sparse: Performance tests of sparse matrix operations.

Otherwise add a subdirectory containing the file perf.jl and update the Makefile as well.

In perf.jl, include("../perfutil.jl") and then run the performance test functions with the @timeit macro. For example:

@timeit(spelltest(tests1), "spell", "Peter Norvig's spell corrector")

with arguments: test function call, name of the test, description, and, optionally, a group (only used for codespeed). @timeit will do a warm-up and then 5 timings, calculating min, max, average and standard deviation of the timings.

If possible aim for the tests to take about 10-100 microseconds.

Just include perfutil.jl, use @timeit on the functions to be benchmarked. Alternatively have a look at the Benchmark package.

• HTTPClient
• JSON
• DataStructures
• SortingAlgorithms