fix(requests): Manually compute default max_workers or pool size is None

devine/core/downloaders/requests.py

@@ -1,4 +1,5 @@
 import math
+import os
 import time
 from concurrent import futures
 from concurrent.futures.thread import ThreadPoolExecutor
@@ -196,6 +197,9 @@ def requests(
     if not isinstance(urls, list):
         urls = [urls]
 
+    if not max_workers:
+        max_workers = min(32, (os.cpu_count() or 1) + 4)
+
     urls = [
         dict(
             save_path=save_path,