flashinfer_cache.patch

--- a/flashinfer/artifacts.py
+++ b/flashinfer/artifacts.py
@@ -203,9 +203,13 @@
         with ThreadPoolExecutor(num_threads) as pool:
             futures = []
-            for name, _ in cubin_files:
-                source = safe_urljoin(FLASHINFER_CUBINS_REPOSITORY, name)
-                local_path = FLASHINFER_CUBIN_DIR / name
+            for name, checksum in cubin_files:
+                local_path = FLASHINFER_CUBIN_DIR / name
+                if local_path.exists() and verify_cubin(str(local_path), checksum):
+                    pbar.update(1)
+                    continue
+
+                source = safe_urljoin(FLASHINFER_CUBINS_REPOSITORY, name)
                 # Ensure parent directory exists
                 local_path.parent.mkdir(parents=True, exist_ok=True)
                 fut = pool.submit(