perf: use pickle's loads/dumps as a faster deepcopy (#5281)

* Use pickle's loads/dumps as a faster deepcopy Signed-off-by: Marcel Bargull <marcel.bargull@udo.edu> * ref: use clearer protocol spec * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Create 5281-perf-deepcopy * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml * Update pyproject.toml --------- Signed-off-by: Marcel Bargull <marcel.bargull@udo.edu> Co-authored-by: Marcel Bargull <marcel.bargull@udo.edu> Co-authored-by: Matthew R. Becker <beckermr@users.noreply.github.com> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
conda · Jun 25, 2024 · 3a09f13 · 3a09f13
1 parent fbbc298
commit 3a09f13
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Showing 3 changed files with 10 additions and 2 deletions.
diff --git a/conda_build/config.py b/conda_build/config.py
@@ -9,6 +9,7 @@
 import copy
 import math
 import os
+import pickle
 import re
 import shutil
 import time
@@ -820,9 +821,12 @@ def clean_pkgs(self):
 
     def copy(self) -> Config:
         new = copy.copy(self)
-        new.variant = copy.deepcopy(self.variant)
+        # Use picke.loads(pickle.dumps(...) as a faster copy.deepcopy alternative.
+        new.variant = pickle.loads(pickle.dumps(self.variant, pickle.HIGHEST_PROTOCOL))
         if hasattr(self, "variants"):
-            new.variants = copy.deepcopy(self.variants)
+            new.variants = pickle.loads(
+                pickle.dumps(self.variants, pickle.HIGHEST_PROTOCOL)
+            )
         return new
 
     # context management - automatic cleanup if self.dirty or self.keep_old_work is not True

diff --git a/news/5281-perf-deepcopy b/news/5281-perf-deepcopy
@@ -0,0 +1,3 @@
+### Enhancements
+
+* Increased performance by using pickle instead of deepcopy. (#5281)
diff --git a/pyproject.toml b/pyproject.toml
@@ -129,6 +129,7 @@ filterwarnings = [
   # ignore conda-index error
   "ignore::PendingDeprecationWarning:conda_index",
   "ignore::DeprecationWarning:conda_index",
+  "ignore:Python 3.14 will, by default, filter extracted tar archives and reject files or modify their metadata:DeprecationWarning",
 ]
 markers = [
   "serial: execute test serially (to avoid race conditions)",
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		### Enhancements

		* Increased performance by using pickle instead of deepcopy. (#5281)