From 692eb0603d5305a19407302721d4cd6790235496 Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal+gh@gmail.com>
Date: Mon, 20 Mar 2017 18:24:44 +0100
Subject: [PATCH] Fix high memory usage in download command

Due to PyPi issue #2984, installing large packages via pip causes
a large spike in memory usage. The recommended fix is to disable
caching.
---
 spacy/cli/download.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spacy/cli/download.py b/spacy/cli/download.py
index 446de4a37..56dbd5264 100644
--- a/spacy/cli/download.py
+++ b/spacy/cli/download.py
@@ -56,7 +56,8 @@ def get_version(model, comp):
 def download_model(filename):
     util.print_msg("Downloading {f}".format(f=filename))
     download_url = about.__download_url__ + '/' + filename
-    subprocess.call([sys.executable, '-m', 'pip', 'install', download_url],
+    subprocess.call([sys.executable, '-m',
+        'pip', 'install', '--no-cache-dir', download_url],
         env=os.environ.copy())