[pypy-commit] pypy gc-incminimark-pinning-improve: use pinning on input buffer in rzlib

[groggi]

Author: Gregor Wegberg <code at gregorwegberg.com>
Branch: gc-incminimark-pinning-improve
Changeset: r76529:5fda4d8f0436
Date: 2015-03-23 15:23 +0100
http://bitbucket.org/pypy/pypy/changeset/5fda4d8f0436/

Log:	use pinning on input buffer in rzlib

	This removes one malloc for each compress()/decompress()

diff --git a/rpython/rlib/rzlib.py b/rpython/rlib/rzlib.py
--- a/rpython/rlib/rzlib.py
+++ b/rpython/rlib/rzlib.py
@@ -365,10 +365,7 @@
     """Common code for compress() and decompress().
     """
     # Prepare the input buffer for the stream
-    with lltype.scoped_alloc(rffi.CCHARP.TO, len(data)) as inbuf:
-        # XXX (groggi) should be possible to improve this with pinning by
-        # not performing the 'copy_string_to_raw' if non-movable/pinned
-        copy_string_to_raw(llstr(data), inbuf, 0, len(data))
+    with rffi.scoped_nonmovingbuffer(data) as inbuf:
         stream.c_next_in = rffi.cast(Bytefp, inbuf)
         rffi.setintfield(stream, 'c_avail_in', len(data))