update default processes to cpu count

objaverse_xl/objaverse_v1.py

@@ -4,6 +4,7 @@ import gzip
 import json
 import os
 import urllib.request
+import multiprocessing
 from multiprocessing import Pool
 from typing import Any, Dict, List, Optional, Tuple, Callable
 import requests
@@ -336,8 +337,10 @@ class SketchfabDownloader(ObjaverseSource):
             download_dir (Optional[str], optional): The base directory to download the
                 object to. Supports all file systems supported by fsspec. If None, the
                 objects will be removed after downloading. Defaults to "~/.objaverse".
-            processes (int, optional): The number of processes to use to download
-                the objects. Defaults to 1.
+            processes (Optional[int], optional): The number of processes to use to
+                download the objects. If None, the number of processes will be set to
+                the number of CPUs on the machine (multiprocessing.cpu_count()).
+                Defaults to None.
             handle_found_object (Optional[Callable], optional): Called when an object is
                 successfully found and downloaded. Here, the object has the same sha256
                 as the one that was downloaded with Objaverse-XL. If None, the object
@@ -384,6 +387,8 @@ class SketchfabDownloader(ObjaverseSource):
         hf_object_paths = self._load_object_paths(
             download_dir=download_dir if download_dir is not None else "~/.objaverse"
         )
+        if processes is None:
+            processes = multiprocessing.cpu_count()
 
         # make a copy of the objects so we don't modify the original
         objects = objects.copy()
@@ -456,7 +461,9 @@ class SketchfabDownloader(ObjaverseSource):
                     (item["fileIdentifier"], hf_object_paths[uid], item["sha256"])
                 )
 
-            logger.info(f"Downloading {len(objects_to_download)} new objects")
+            logger.info(
+                f"Downloading {len(objects_to_download)} new objects across {processes} processes"
+            )
 
         # check if all objects are already downloaded
         if len(objects_to_download) == 0: