Programmatically disable coverage when running on PyPy.

1 files changed, 18 insertions, 0 deletions

diff --git a/conftest.py b/conftest.py
index 1746bfb5..0bc8d320 100644
--- a/conftest.py
+++ b/conftest.py
@@ -17,6 +17,24 @@ collect_ignore = [
 ]
 
 
+def pytest_configure(config):
+    disable_coverage_on_pypy(config)
+
+
+def disable_coverage_on_pypy(config):
+    """
+    Coverage makes tests on PyPy unbearably slow, so disable it.
+    """
+    if '__pypy__' not in sys.builtin_module_names:
+        return
+
+    # Recommended at pytest-dev/pytest-cov#418
+    cov = config.pluginmanager.get_plugin('_cov')
+    cov.options.no_cov = True
+    if cov.cov_controller:
+        cov.cov_controller.pause()
+
+
 if sys.version_info < (3,):
     collect_ignore.append('setuptools/lib2to3_ex.py')
     collect_ignore.append('setuptools/_imp.py')