matplotlib
diff --git a/‎doc/make.py
Lines changed: 4 additions & 2 deletions b/‎doc/make.py
Lines changed: 4 additions & 2 deletions
diff --git a/‎doc/sphinxext/math_symbol_table.py
Lines changed: 3 additions & 0 deletions b/‎doc/sphinxext/math_symbol_table.py
Lines changed: 3 additions & 0 deletions
diff --git a/‎lib/matplotlib/sphinxext/mathmpl.py
Lines changed: 3 additions & 0 deletions b/‎lib/matplotlib/sphinxext/mathmpl.py
Lines changed: 3 additions & 0 deletions
diff --git a/‎lib/matplotlib/sphinxext/only_directives.py
Lines changed: 7 additions & 6 deletions b/‎lib/matplotlib/sphinxext/only_directives.py
Lines changed: 7 additions & 6 deletions
@@ -2,6 +2,7 @@
 
 from __future__ import print_function
 import glob
+import multiprocessing
 import os
 import shutil
 import sys
@@ -52,7 +53,8 @@ def html(buildername='html'):
         options = ''
     if warnings_as_errors:
         options = options + ' -W'
-    if os.system('sphinx-build %s -b %s -d build/doctrees . build/%s' % (options, buildername, buildername)):
+    if os.system('sphinx-build -j %d %s -b %s -d build/doctrees . build/%s' % (
+            multiprocessing.cpu_count(), options, buildername, buildername)):
         raise SystemExit("Building HTML failed.")
 
     # Clean out PDF files from the _images directory
@@ -67,7 +69,7 @@ def htmlhelp():
     with open('build/htmlhelp/index.html', 'r+') as fh:
         content = fh.read()
         fh.seek(0)
-        content = re.sub(r'<script>.*?</script>', '', content, 
+        content = re.sub(r'<script>.*?</script>', '', content,
                          flags=re.MULTILINE| re.DOTALL)
         fh.write(content)
         fh.truncate()
 
@@ -138,6 +138,9 @@ def setup(app):
         'math_symbol_table', math_symbol_table_directive,
         False, (0, 1, 0))
 
+    metadata = {'parallel_read_safe': True, 'parallel_write_safe': True}
+    return metadata
+
 if __name__ == "__main__":
     # Do some verification of the tables
     from matplotlib import _mathtext_data
 
@@ -118,3 +118,6 @@ def depart_latex_math_latex(self, node):
     app.add_role('math', math_role)
     app.add_directive('math', math_directive,
                       True, (0, 0, 0), **options_spec)
+
+    metadata = {'parallel_read_safe': True, 'parallel_write_safe': True}
+    return metadata
@@ -64,9 +64,10 @@ def visit_ignore(self, node):
     def depart_ignore(self, node):
         node.children = []
 
-    app.add_node(html_only,
-                 html=(visit_perform, depart_perform),
-                 latex=(visit_ignore, depart_ignore))
-    app.add_node(latex_only,
-                 latex=(visit_perform, depart_perform),
-                 html=(visit_ignore, depart_ignore))
+    app.add_node(html_only, html=(visit_perform, depart_perform))
+    app.add_node(html_only, latex=(visit_ignore, depart_ignore))
+    app.add_node(latex_only, latex=(visit_perform, depart_perform))
+    app.add_node(latex_only, html=(visit_ignore, depart_ignore))
+
+    metadata = {'parallel_read_safe': True, 'parallel_write_safe': True}
+    return metadata