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emacs: Use streaming S-expr parser for search

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In addition to being the Right Thing to do, this noticeably improves
the time taken to display the first page of search results, since it's
roughly an order of magnitude faster than the JSON parser.
Interestingly, it does *not* significantly improve the time to
completely fill a large search buffer because for large search
buffers, the cost of creating author invisibility overlays and
inserting text (which slows down with more overlays) dominates.
However, the time required to display the first page of results is
generally more important to the user experience.
This commit is contained in:
Austin Clements 2013-05-31 20:40:07 -04:00 committed by David Bremner
parent b89ffba301
commit 89efd5717a
2 changed files with 6 additions and 17 deletions
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13
emacs/notmuch.el
View file

@ -58,6 +58,7 @@
(require 'notmuch-hello)
(require 'notmuch-maildir-fcc)
(require 'notmuch-message)
(require 'notmuch-parser)
(defcustom notmuch-search-result-format
`(("date" . "%12s ")
@ -809,13 +810,6 @@ non-authors is found, assume that all of the authors match."
(setq notmuch-search-target-thread "found")
(goto-char beg)))))
(defun notmuch-search-show-error (string &rest objects)
(save-excursion
(goto-char (point-max))
(insert "Error: Unexpected output from notmuch search:\n")
(insert (apply #'format string objects))
(insert "\n")))
(defun notmuch-search-process-filter (proc string)
"Process and filter the output of \"notmuch search\""
(let ((results-buf (process-buffer proc))
@ -829,8 +823,7 @@ non-authors is found, assume that all of the authors match."
(save-excursion
(goto-char (point-max))
(insert string))
(notmuch-json-parse-partial-list 'notmuch-search-show-result
'notmuch-search-show-error
(notmuch-sexp-parse-partial-list 'notmuch-search-show-result
results-buf)))))
(defun notmuch-search-tag-all (&optional tag-changes)
@ -933,7 +926,7 @@ Other optional parameters are used as follows:
(save-excursion
(let ((proc (notmuch-start-notmuch
"notmuch-search" buffer #'notmuch-search-process-sentinel
"search" "--format=json" "--format-version=1"
"search" "--format=sexp" "--format-version=1"
(if oldest-first
"--sort=oldest-first"
"--sort=newest-first")

10
test/emacs
View file

@ -858,7 +858,7 @@ test_expect_success "Rendering HTML mail with images" \
test_begin_subtest "Search handles subprocess error exit codes"
cat > notmuch_fail <<EOF
#!/bin/sh
echo This is output
echo '()'
exit 1
EOF
chmod a+x notmuch_fail
@ -873,21 +873,19 @@ test_emacs "(let ((notmuch-command \"$PWD/notmuch_fail\"))
(test-output))"
sed -i -e 's/^\[.*\]$/[XXX]/' ERROR
test_expect_equal "$(cat OUTPUT; echo ---; cat MESSAGES; echo ---; cat ERROR)" "\
Error: Unexpected output from notmuch search:
This is output
End of search results.
---
$PWD/notmuch_fail exited with status 1 (see *Notmuch errors* for more details)
---
[XXX]
$PWD/notmuch_fail exited with status 1
command: $PWD/notmuch_fail search --format\=json --format-version\=1 --sort\=newest-first tag\:inbox
command: $PWD/notmuch_fail search --format\=sexp --format-version\=1 --sort\=newest-first tag\:inbox
exit status: 1"
test_begin_subtest "Search handles subprocess warnings"
cat > notmuch_fail <<EOF
#!/bin/sh
echo This is output
echo '()'
echo This is a warning >&2
echo This is another warning >&2
exit 0
@ -905,8 +903,6 @@ test_emacs "(let ((notmuch-command \"$PWD/notmuch_fail\"))
(test-output))"
sed -i -e 's/^\[.*\]$/[XXX]/' ERROR
test_expect_equal "$(cat OUTPUT; echo ---; cat MESSAGES; echo ---; cat ERROR)" "\
Error: Unexpected output from notmuch search:
This is output
End of search results.
---
This is a warning (see *Notmuch errors* for more details)