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org-odt.el: Fix performance issue on manifest file writing
* contrib/lisp/org-odt.el (org-odt-write-manifest-file): Don't use write-region. The org-odt-write-manifest-file function take too much time - several seconds for 164 files. This patch provides a cheaper implementation (hundredths of a seconds for 164 files). Original patch by Jérémy Compostella <jeremy.compostella@gmail.com>. Rewritten by Jambunathan K to minimize the actual number of lines changed. TINYCHANGE. From http://www.mail-archive.com/emacs-orgmode@gnu.org/msg49248.html I'm currently generating a road book for a trip from different Org-Mode file and other data. It results in a 13 thousands lines Org-Mode file and I have some performance issues. Using the ELP package, I isolated the two main bottlenecks. One is in org-odt : the org-odt-write-manifest-file function is called once and takes 5.546672 seconds to write a 167 lines file. I rewrote this function and now it takes 0.01606 seconds to write the same file.
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@ -1959,21 +1959,22 @@ visually."
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(defun org-odt-write-manifest-file ()
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(make-directory "META-INF")
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(let ((manifest-file (expand-file-name "META-INF/manifest.xml")))
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(write-region
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(with-current-buffer
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(find-file-noselect manifest-file t)
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(insert
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"<?xml version=\"1.0\" encoding=\"UTF-8\"?>
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<manifest:manifest xmlns:manifest=\"urn:oasis:names:tc:opendocument:xmlns:manifest:1.0\" manifest:version=\"1.2\">\n"
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nil manifest-file)
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<manifest:manifest xmlns:manifest=\"urn:oasis:names:tc:opendocument:xmlns:manifest:1.0\" manifest:version=\"1.2\">\n")
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(mapc
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(lambda (file-entry)
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(let* ((version (nth 2 file-entry))
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(extra (if version
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(format " manifest:version=\"%s\"" version)
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"")))
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(write-region
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(insert
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(format org-odt-manifest-file-entry-tag
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(nth 0 file-entry) (nth 1 file-entry) extra)
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nil manifest-file t))) org-odt-manifest-file-entries)
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(write-region "\n</manifest:manifest>" nil manifest-file t)))
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(nth 0 file-entry) (nth 1 file-entry) extra))))
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org-odt-manifest-file-entries)
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(insert "\n</manifest:manifest>"))))
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(defun org-odt-update-meta-file (opt-plist)
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(let ((date (org-odt-iso-date-from-org-timestamp
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