[Bug 1342175] Re: [upstream] Poor performance with find & replace with empty value on large data set

[Björn Michaelsen]

Has there been any testing of this? I see the commits have not been
backported to 4.3 and have not yet been released in any upstream
release. Are we sure these patches are not causing any regressions by
having all that is needed and nothing more?

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

Status in LibreOffice Productivity Suite:
  Confirmed
Status in “libreoffice” package in Ubuntu:
  In Progress

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]

  [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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