Issue #4258: Use 30-bit digits for Python longs, on 64-bit platforms.
Backport of r70459.
diff --git a/Misc/NEWS b/Misc/NEWS
index 09bbc7a..5d494df 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,13 @@
Core and Builtins
-----------------
+- Issue #4258: Make it possible to use base 2**30 instead of base
+ 2**15 for the internal representation of integers, for performance
+ reasons. Base 2**30 is enabled by default on 64-bit machines. Add
+ --enable-big-digits option to configure, which overrides the
+ default. Add sys.long_info structseq to provide information about
+ the internal format.
+
- Issue #4034: Fix weird attribute error messages of the traceback object. (As a
result traceback.__members__ no longer exists.)