Optimised by pre-compiling regex patterns

_src/build.py

@@ -17,6 +17,13 @@ from config import config # from itself
 from bs4 import BeautifulSoup # from beautifulsoup4
 from gemtext import GemtextParser # from itself
 
+# regex pre-compilation
+REGEX = {
+    'evaluation': re.compile(r'\{([^\s}]+([^}]*[^\s}])?)\}'),
+    'url': re.compile(r'(https?://)([-\w]+[-\w.]*)(/\S*)?'),
+    'generic_url': re.compile(r'^[\w]+:')
+}
+
 def template_for(path: str) -> str:
     """Determine used template for the file
     Returns the last matching template from the config or None
@@ -59,7 +66,7 @@ def evaluate_this(content: str, global_ns: dict, local_ns: dict = {}) -> str:
     use namespace_from() to generate one.
     """
     
-    return re.sub(r'\{([^\s}]+([^}]*[^\s}])?)\}',
+    return REGEX['evaluation'].sub(
         partial(evaluate, global_ns=global_ns, local_ns=local_ns),
         content)
 
@@ -122,7 +129,7 @@ def gemtext2html(parser: GemtextParser, rotate_extension=True) -> BeautifulSoup:
             else:
                 href = item.href
                 # html links typically points to .html files
-                if rotate_extension and href.endswith('.gmi') and not re.match(r'^[\w]+:', href):
+                if rotate_extension and href.endswith('.gmi') and not REGEX['generic_url'].match(href):
                     href = os.path.splitext(href)[0] + '.html'
                 el = soup.new_tag('a', href=href)
                 if item.label:
@@ -172,7 +179,7 @@ def convert_href(href: str, path: str) -> str:
     if href.startswith('/'):
         output = os.path.relpath(href[1:], start=os.path.dirname(path))
     elif 'redirections' in config:
-        output = re.sub(r'(https?://)([-\w]+[-\w.]*)(/\S*)?', partial(
+        output = REGEX['url'].sub(partial(
             redirect,
             domains=dict(config['redirections'])
         ), href)