Add coverage benchmark (#213)

.gitignore

@@ -21,3 +21,6 @@ pyperformance/tests/data/cpython/
 
 # Created by the tox program
 .tox/
+
+# coverage
+.coverage

pyperformance/data-files/benchmarks/MANIFEST

@@ -6,6 +6,7 @@ async_tree	<local>
 async_tree_cpu_io_mixed	<local:async_tree>
 async_tree_io	<local:async_tree>
 async_tree_memoization	<local:async_tree>
+coverage	<local>
 generators	<local>
 chameleon	<local>
 chaos	<local>

pyperformance/data-files/benchmarks/bm_coverage/pyproject.toml

@@ -0,0 +1,12 @@
+[project]
+name = "pyperformance_bm_coverage"
+requires-python = ">=3.8"
+dependencies = [
+    "pyperf",
+    "coverage",
+]
+urls = {repository = "https://github.com/python/pyperformance"}
+dynamic = ["version"]
+
+[tool.pyperformance]
+name = "coverage"

pyperformance/data-files/benchmarks/bm_coverage/requirements.txt

@@ -0,0 +1 @@
+coverage==6.4.1

pyperformance/data-files/benchmarks/bm_coverage/run_benchmark.py

@@ -0,0 +1,29 @@
+"""
+Benchmark coverage performance with a recursive fibonacci function.
+"""
+
+import coverage
+import pyperf
+
+
+def fibonacci(n: int) -> int:
+    if n <= 1:
+        return n
+    return fibonacci(n - 1) + fibonacci(n - 2)
+
+
+def bench_coverage(loops: int) -> None:
+    range_it = range(loops)
+    cov = coverage.Coverage()
+    cov.start()
+    t0 = pyperf.perf_counter()
+    for _ in range_it:
+        fibonacci(25)
+    cov.stop()
+    return pyperf.perf_counter() - t0
+
+
+if __name__ == "__main__":
+    runner = pyperf.Runner()
+    runner.metadata['description'] = "Benchmark coverage"
+    runner.bench_time_func('coverage', bench_coverage)