feed: compile regex once

lumbunglib/feed.py

@@ -12,7 +12,8 @@ import jinja2
 import requests
 from bs4 import BeautifulSoup
 from slugify import slugify
-from re import sub
+from re import compile as re_compile
+yamlre = re_compile('"')
 
 
 def write_etag(feed_name, feed_data):
@@ -48,7 +49,7 @@ def get_etag(feed_name):
 
 def create_frontmatter(entry):
     """
-    parse RSS metadata and return as frontmatter 
+    parse RSS metadata and return as frontmatter
     """
     if 'published' in entry:
         published = entry.published_parsed
@@ -61,7 +62,7 @@ def create_frontmatter(entry):
         author = entry.author
     else:
         author = ''
-    
+
     if 'authors' in entry:
         authors = []
         for a in entry.authors:
@@ -119,12 +120,12 @@ def sanitize_yaml (frontmatter):
             #some fields are lists
             l = []
             for i in v:
-                i = sub('"', '\\"', i)
+                i = yamlre.sub('\\"', i)
                 l.append(i)
             frontmatter[k] = l
 
         else:
-            v = sub('"', '\\"', v)
+            v = yamlre.sub('\\"', v)
             frontmatter[k] = v
 
     return frontmatter
@@ -348,7 +349,7 @@ def main():
                 entry["feed_name"] = feed_name
 
                 post_name = slugify(entry.title)
-                
+
                 # pixelfed returns the whole post text as the post name. max
                 # filename length is 255 on many systems. here we're shortening
                 # the name and adding a hash to it to avoid a conflict in a
@@ -356,7 +357,7 @@ def main():
                 if len(post_name) > 150:
                     post_hash = md5(bytes(post_name, "utf-8"))
                     post_name = post_name[:150] + "-" + post_hash.hexdigest()
-                
+
                 if opds_feed:
                     entry['opds'] = True
                     #format: Beyond-Debiasing-Report_Online-75535a4886e3
@@ -376,7 +377,7 @@ def main():
                     if opds_feed:
                         create_opds_post(post_dir, entry)
                     else:
-                        create_post(post_dir, entry)   
+                        create_post(post_dir, entry)
                     existing_posts.remove(
                         post_name
                     )  # create list of posts which have not been returned by the feed