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+From: Austin Clements <amdragon@MIT.EDU>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH v2 5/5] emacs: Use streaming S-expr parser for search\r
+Date: Thu, 30 May 2013 13:13:36 -0400\r
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+\r
+In addition to being the Right Thing to do, this noticeably improves\r
+the time taken to display the first page of search results, since it's\r
+roughly an order of magnitude faster than the JSON parser.\r
+Interestingly, it does *not* significantly improve the time to\r
+completely fill a large search buffer because for large search\r
+buffers, the cost of creating author invisibility overlays and\r
+inserting text (which slows down with more overlays) dominates.\r
+However, the time required to display the first page of results is\r
+generally more important to the user experience.\r
+---\r
+ emacs/notmuch.el | 13 +++----------\r
+ test/emacs | 10 +++-------\r
+ 2 files changed, 6 insertions(+), 17 deletions(-)\r
+\r
+diff --git a/emacs/notmuch.el b/emacs/notmuch.el\r
+index b8d9c44..5a8c957 100644\r
+--- a/emacs/notmuch.el\r
++++ b/emacs/notmuch.el\r
+@@ -58,6 +58,7 @@\r
+ (require 'notmuch-hello)\r
+ (require 'notmuch-maildir-fcc)\r
+ (require 'notmuch-message)\r
++(require 'notmuch-parser)\r
+ \r
+ (defcustom notmuch-search-result-format\r
+ `(("date" . "%12s ")\r
+@@ -809,13 +810,6 @@ non-authors is found, assume that all of the authors match."\r
+ (setq notmuch-search-target-thread "found")\r
+ (goto-char beg)))))\r
+ \r
+-(defun notmuch-search-show-error (string &rest objects)\r
+- (save-excursion\r
+- (goto-char (point-max))\r
+- (insert "Error: Unexpected output from notmuch search:\n")\r
+- (insert (apply #'format string objects))\r
+- (insert "\n")))\r
+-\r
+ (defun notmuch-search-process-filter (proc string)\r
+ "Process and filter the output of \"notmuch search\""\r
+ (let ((results-buf (process-buffer proc))\r
+@@ -829,8 +823,7 @@ non-authors is found, assume that all of the authors match."\r
+ (save-excursion\r
+ (goto-char (point-max))\r
+ (insert string))\r
+- (notmuch-json-parse-partial-list 'notmuch-search-show-result\r
+- 'notmuch-search-show-error\r
++ (notmuch-sexp-parse-partial-list 'notmuch-search-show-result\r
+ results-buf)))))\r
+ \r
+ (defun notmuch-search-tag-all (&optional tag-changes)\r
+@@ -933,7 +926,7 @@ Other optional parameters are used as follows:\r
+ (save-excursion\r
+ (let ((proc (notmuch-start-notmuch\r
+ "notmuch-search" buffer #'notmuch-search-process-sentinel\r
+- "search" "--format=json" "--format-version=1"\r
++ "search" "--format=sexp" "--format-version=1"\r
+ (if oldest-first\r
+ "--sort=oldest-first"\r
+ "--sort=newest-first")\r
+diff --git a/test/emacs b/test/emacs\r
+index d38ae8c..7d42abf 100755\r
+--- a/test/emacs\r
++++ b/test/emacs\r
+@@ -856,7 +856,7 @@ test_expect_success "Rendering HTML mail with images" \\r
+ test_begin_subtest "Search handles subprocess error exit codes"\r
+ cat > notmuch_fail <<EOF\r
+ #!/bin/sh\r
+-echo This is output\r
++echo '()'\r
+ exit 1\r
+ EOF\r
+ chmod a+x notmuch_fail\r
+@@ -871,21 +871,19 @@ test_emacs "(let ((notmuch-command \"$PWD/notmuch_fail\"))\r
+ (test-output))"\r
+ sed -i -e 's/^\[.*\]$/[XXX]/' ERROR\r
+ test_expect_equal "$(cat OUTPUT; echo ---; cat MESSAGES; echo ---; cat ERROR)" "\\r
+-Error: Unexpected output from notmuch search:\r
+-This is output\r
+ End of search results.\r
+ ---\r
+ $PWD/notmuch_fail exited with status 1 (see *Notmuch errors* for more details)\r
+ ---\r
+ [XXX]\r
+ $PWD/notmuch_fail exited with status 1\r
+-command: $PWD/notmuch_fail search --format\=json --format-version\=1 --sort\=newest-first tag\:inbox\r
++command: $PWD/notmuch_fail search --format\=sexp --format-version\=1 --sort\=newest-first tag\:inbox\r
+ exit status: 1"\r
+ \r
+ test_begin_subtest "Search handles subprocess warnings"\r
+ cat > notmuch_fail <<EOF\r
+ #!/bin/sh\r
+-echo This is output\r
++echo '()'\r
+ echo This is a warning >&2\r
+ echo This is another warning >&2\r
+ exit 0\r
+@@ -903,8 +901,6 @@ test_emacs "(let ((notmuch-command \"$PWD/notmuch_fail\"))\r
+ (test-output))"\r
+ sed -i -e 's/^\[.*\]$/[XXX]/' ERROR\r
+ test_expect_equal "$(cat OUTPUT; echo ---; cat MESSAGES; echo ---; cat ERROR)" "\\r
+-Error: Unexpected output from notmuch search:\r
+-This is output\r
+ End of search results.\r
+ ---\r
+ This is a warning (see *Notmuch errors* for more details)\r
+-- \r
+1.7.10.4\r
+\r