Experiments

A collection of little experiments and tools that may help a TypeScript developer throughout the weekend afternoons.

How to use

Benchmark

If you want to compare the performance of multiple approaches to a problem:

• Open src/benchmark.ts
• Update the add tests section to contain the experiments that you wish to measure
  • Be careful to ensure that individual tests are identical in all ways except for the variation that is being tested.
• Run yarn benchmark or yarn benchmark:dev

How to read the results

Typical results look something like this:

Starting benchmarks for INPUT_SIZE 10000⏱️ Measurements┌───────────────────────┬───────────┬─────────────────┬──────────────┐│ (index) │ hz │ margin of error │ runs sampled │├───────────────────────┼───────────┼─────────────────┼──────────────┤│ map.has │ '8.59e+8' │ '±1.59%' │ 88 ││ array.includes │ '8.03e+8' │ '±0.99%' │ 79 ││ set.has │ '7.18e+7' │ '±0.96%' │ 95 ││ object.hasOwnProperty │ '2.13e+7' │ '±1.27%' │ 92 │└───────────────────────┴───────────┴─────────────────┴──────────────┘🏁 Comparison Matrix┌───────────────────────┬─────────┬─────────┬─────────┬─────────┐│ (index) │ map.has │ arryncl │ set.has │ objctOP │├───────────────────────┼─────────┼─────────┼─────────┼─────────┤│ map.has │ 1 │ 1.07 │ 11.96 │ 40.33 ││ array.includes │ 0.94 │ 1 │ 11.19 │ 37.71 ││ set.has │ 0.08 │ 0.09 │ 1 │ 3.37 ││ object.hasOwnProperty │ 0.02 │ 0.03 │ 0.3 │ 1 │└───────────────────────┴─────────┴─────────┴─────────┴─────────┘

☝️ This can be interpreted like so...

For an INPUT_SIZE of 10000:

• The code inside the map.has test can be executed at a rate of ~8.59e+8 times per second.
• ...
• The code inside the object.hasOwnProperty test can be executed at a rate of ~2.13e+7 times per second.
• ...
• The code inside the map.has test is ~40.33 times faster than the code inside the object.hasOwnProperty test.

Given those results, you can choose which alternative approach to use. 🚀

Scratchpad

If you want to try something out:

• Open src/scratchpad.ts
• Update the code with the thing that you want to try out
• Run yarn scratchpad or yarn scratchpad:dev

Miscellaneous Experiments

Some experiments have their own [whateverName].md docs.

• The Monty Hall problem