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[Launchpad Bug Tracker <1342175@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package libreoffice - 1:4.2.7-0ubuntu2

---------------
libreoffice (1:4.2.7-0ubuntu2) trusty; urgency=medium

  * backport search & replace w/ empty performance fix (LP: #1342175)
  * add additional backported upstream fixes for fdo#82936, fdo#85282,
    fdo#85215, fdo#83765, fdo#79441, fdo#86708 (LP: #1389858)
 -- Bjoern Michaelsen <bjoern.michaelsen@xxxxxxxxxxxxx>   Wed, 26 Nov 2014 19:24:35 +0100

** Changed in: libreoffice (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1342175

Title:
  [upstream] Poor performance with find & replace with empty value on
  large data set

Status in LibreOffice Productivity Suite:
  Fix Released
Status in libreoffice package in Ubuntu:
  Fix Committed
Status in libreoffice source package in Trusty:
  Fix Released

Bug description:
  [SRU justification]

  [Impact]

  Hang or Very slow performance after replaceall or searchall massive
  data

  Regression in Find and Replace with LO Calc 4.2 (last worked in 4.1).
  It now takes a long time to "Find and Replace" if the to be replaced
  is to nothing.

  See comment #5/#6 of upstream for reproducer.
  See commend #8 for bibisect.

  [Test Case]

  fill A column to 0
  select A column

  Replace All 0 to " " ( null space )

  [Regression Potential]
  restricted, relevant patches are currently:
  - upstream master
  - all upstream 4.4.0 alpha/beta builds
  - upstream 4-4 branch
  - backported (by me) to upstream 4-3 branch
    => thus also included in upstream 4.3.5~rc1 released on November, 27th
    => thus will also be released by upstream 4.3.5 on ~December, 18th
  - backported to 4.3.4/utopic package (downstream, Ubuntu only)
  - backported to 4.2.7/trusty package (downstream, Ubuntu only)
  - included in all current 4.3.x and 4.2.x backports in the LibreOffice PPAs
  - included in all the 4.4~beta1 builds on the LibreOffice prereleases PPA

  
  [Other Info]
  upstream patch

  http://cgit.freedesktop.org/libreoffice/core/commit/?id=1cf19ea84794ca065749667b480dfed2d27d47b7
  http://cgit.freedesktop.org/libreoffice/core/commit/?id=1e721077b43de84edab2a3ed2f316ddcbec6e3ec
  http://cgit.freedesktop.org/libreoffice/core/commit/?id=91502a72c12c559442e8bf77c27a516b49c2a68d

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