https://bugs.documentfoundation.org/show_bug.cgi?id=169209
Bug ID: 169209
Summary: Edit: large files Supports edit 10GB large files
Product: LibreOffice
Version: 26.2.0.0 alpha0+ master
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: enhancement
Priority: medium
Component: LibreOffice
Assignee: [email protected]
Reporter: [email protected]
Description:
LibreOffice freezes and becomes unresponsive when opening a 10MB “.txt” file.
We plan to use LibreOffice to write some novels and books. The novels are in
Chinese format, and the file size is generally between 5 and 200MB.
We have some books in our work that are high-resolution scanned PDFs exceeding
5GB.
Steps to Reproduce:
1. Download and open
https://archive.org/download/20240411_1320/%E6%83%85%E6%AC%B2%E8%B6%85%E5%B8%82.txt
2. Stuck and unresponsive
3.
Actual Results:
Download and open
Expected Results:
Edit large files quickly.
Reproducible: Always
User Profile Reset: Yes
Additional Info:
Solution Refer to MS filemapping
maybe the libreoffice could use the MS filemapping
https://learn.microsoft.com/en-us/windows/win32/memory/file-mapping
Solution Refer to EmEditor.
https://www.emeditor.com/text-editor-features/large-file-support/
EmEditor is built to handle files of any size. When you ask it to open a file
over a certain size (you choose the size), EmEditor will automatically start
using temporary disk space rather than clogging up your memory, unlike most
other text editors, which try to keep the whole file in memory and ultimately
fail.
By default, EmEditor uses temporary files when it opens a file larger than 300
MB. You can check and edit this size in the Advanced tab of the Customize
dialog box. If you open a file larger than this size, a few highlighting
features are disabled, including multiple-line comments. Wrapping modes are
also disabled for optimal speed. If you are opening a file larger than this
size, make sure there is enough disk space in the temporary file folder. The
default temporary folder is the system temporary folder, specified by the
%TEMP% environment variable. You can override the temporary folder to any
folder you would like, that has enough space available.
EmEditor’s multithreaded design allows you to view documents during the opening
of a large file. A status window appears during most time-consuming activities
such as text editing, saving, searching, replacing, inserting and deleting,
which allows you to monitor and cancel those activities at any time.
Large File Controller
The Large File Controller enables you to view and edit files larger than 16TB
(64-bit version) by opening up one section of the file at a time. You can
control which and how many bytes are opened, and view how much disk space is
available.
When you open a large file (that is – larger than the size you specify),
EmEditor displays the Large File Controller by default. This feature helps
EmEditor to quickly open and edit large files by opening up only a section of
the file at a time, and you can control the whole process. The Large File
Controller allows you monitor the entire file size, the amount of the file
already opened, and the available disk space.
Within the Large File Controller, you can stop the opening process by clicking
the Stop button. After that, you can select which portion of the file you want
to open by sliding the From, To, and/or the Size slides, and pressing Apply.
Notice that the numbers you specify will be adjusted to the nearest new lines
when opened, unless binary files are opened. You can also change the display
unit between Bytes and Terabytes. After opening a portion of your file, editing
and saving, the whole file will be saved as one file.
If you don’t want the large file controller to appear during the opening
process, you can go to the File tab of the Customize dialog box, and clear the
“Displays Large File Controller when a large file is opened” check box. You can
always open the large file controller by clicking “Large File Controller” on
the View menu.
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