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<div class="section" id="bzr-1-6-1rc1">
<h1>bzr 1.6.1rc1<a class="headerlink" href="#bzr-1-6-1rc1" title="Permalink to this headline">¶</a></h1>
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<tr class="field"><th class="field-name">Released:</th><td class="field-body">2008-08-29</td>
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<p>This release fixes a few regressions found in the 1.6 client. Fetching
changes was using an O(N^2) buffering algorithm, so for large projects it
would cause memory thrashing. There is also a specific problem with the
<tt class="docutils literal"><span class="pre">--1.6-rich-root</span></tt> format, which prevented stacking on top of
<tt class="docutils literal"><span class="pre">--rich-root-pack</span></tt> repositories, and could allow users to accidentally
fetch experimental data (<tt class="docutils literal"><span class="pre">-subtree</span></tt>) without representing it properly.
The <tt class="docutils literal"><span class="pre">--1.6-rich-root</span></tt> format has been deprecated and users are
recommended to upgrade to <tt class="docutils literal"><span class="pre">--1.6.1-rich-root</span></tt> immediately. Also we
re-introduced a workaround for users who have repositories with incorrect
nodes (not possible if you only used official releases).
I should also clarify that none of this is data loss level issues, but
still sufficient enough to warrant an updated release.</p>
<div class="section" id="bug-fixes">
<h2>Bug Fixes<a class="headerlink" href="#bug-fixes" title="Permalink to this headline">¶</a></h2>
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<li><tt class="docutils literal"><span class="pre">RemoteTransport.readv()</span></tt> was being inefficient about how it
buffered the readv data and processed it. It would keep appending to
the same string (causing many copies) and then pop bytes out of the
start of the string (causing more copies).
With this patch “bzr+ssh://local” can improve dramatically,
especially for projects with large files.
(John Arbash Meinel)</li>
<li>Revision texts were always meant to be stored as fulltexts. There
was a bug in a bzr.dev version that would accidentally create deltas
when copying from a Pack repo to a Knit repo. This has been fixed,
but to support those repositories, we know always request full texts
for Revision texts. (John Arbash Meinel, #261339)</li>
<li>The previous <tt class="docutils literal"><span class="pre">--1.6-rich-root</span></tt> format used an incorrect xml
serializer, which would accidentally support fetching from a
repository that supported subtrees, even though the local one would
not. We deprecated that format, and introduced a new one that uses
the correct serializer <tt class="docutils literal"><span class="pre">--1.6.1-rich-root</span></tt>.
(John Arbash Meinel, #262333)</li>
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