Author: Armin Rigo <[email protected]>
Branch: extradoc
Changeset: r951:9fc40ec9dd54
Date: 2019-07-01 12:46 +0200
http://bitbucket.org/pypy/pypy.org/changeset/9fc40ec9dd54/
Log: Comment that this string-concatenation example does not apply on
bytearrays.
diff --git a/source/performance.txt b/source/performance.txt
--- a/source/performance.txt
+++ b/source/performance.txt
@@ -226,7 +226,9 @@
the JIT cannot optimize out intermediate copies. This code is
actually quadratic in the total size of the mylist strings due to
-repeated string copies of ever-larger prefix segments.
+repeated string copies of ever-larger prefix segments. (Such code
+is always fine for bytearrays, because in this case ``+=`` is an
+in-place operation.)
This::
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