Add in-memory cache around linguist data

Mostly useful for local development, but should help a little in production too

etc/gunicorn.conf.py

@@ -5,7 +5,7 @@ accesslog = "-"
 disable_redirect_access_to_syslog = True
 preload_app = True
 bind = "0.0.0.0:8080"
-max_requests = 800
+max_requests = 1200
 max_requests_jitter = 50
 forwarded_allow_ips = "*"
 

website/contrib/code_block/utils.py

@@ -1,3 +1,4 @@
+from functools import cache
 from importlib.metadata import version
 
 import requests
@@ -10,6 +11,7 @@ PYGMENTS_VERSION_SLUG = PYGMENTS_VERSION.replace(".", "-")
 LINGUIST_DATA_URL = "https://raw.githubusercontent.com/github/linguist/master/lib/linguist/languages.yml"
 
 
+@cache
 @django_cache_decorator(time=21600)
 def get_linguist_colours() -> dict[str, str]:
     response = requests.get(LINGUIST_DATA_URL)