benchmarks: added hyperfine

wiki/benchmark.md

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+# Benchmark
+
+A benchmark is the act of running a program or operation in order to assess its performance.
+Benchmarks can use a range of criteria to compare programs with one another.
+
+## Tools
+
+- [Hyperfine](/wiki/linux/hyperfine.md) is a benchmarking tool for [Linux](/wiki/linux/linux.md).

wiki/linux/hyperfine.md

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+# Hyperfine
+
+[Hyperfine](https://github.com/sharkdp/hyperfine) is a [benchmarking](/wiki/benchmark.md) tool.
+
+## Usage
+
+### Benchmark One or More Programs
+
+To benchmark a program it is recommended to warm up the cache before.
+This can be done as shown in the following command.
+
+```sh
+hyperfine --warmup 5 'sleep 0.3'
+```
+
+Unless specified otherwise at least 10 runs will be made to benchmark a program.
+To change this the `--runs` flag can be used.
+An example of it is given in the following command.
+
+```sh
+hyperfine --warmup 5 --runs 3 'sleep 0.3'
+```
+
+To compare two programs simply append the program to compare to as shown in the following command.
+
+```sh
+hyperfine --warmup 5 'sleep 0.3' 'sleep 0.4'
+```