Optimize manifest.add Testing shows that manifest.add is spending a significant percentage of its time running calcoffsets and doing text = "".join(addlist). This patch removes the need for both of these by storying the manifest in a character array, and using a modified bisect search to find lines without the help of a separate index of line offsets. manifest.add was also reworked to push delta construction/combination into the main loop. Time to apply 2751 patches (without psyco, ext3 noatime,data=writeback): Stock hg: 4m45s real 3m32s user 55s sys patched: 2m48s real 1m53s user 43s sys quilt: 2m30s real 45s user 50s sys (quilt does much more io...)

<table class="changelogEntry parity#parity#">
 <tr>
  <th class="age" width="15%">#date|age# ago:</th>
  <th class="firstline">#desc|strip|firstline|escape#</th>
 </tr>
 <tr>
  <th class="changesetRev">changeset #rev#:</th>
  <td class="changesetNode"><a href="?cs=#node|short#">#node|short#</a></td>
 </tr>
 #parent%changelogparent#
 #changelogtag#
 <tr>
  <th class="author">author:</th>
  <td class="author">#author|obfuscate#</td>
 </tr>
 <tr>
  <th class="date">date:</th>
  <td class="date">#date|date#</td>
 </tr>
 <tr>
  <th class="files"><a href="?mf=#manifest|short#;path=/">files</a>:</th>
  <td class="files">#files#</td>
 </tr>
</table>