From 1922ebcd047c4ea6ebdf8db1ee9bbabdaf54e687 Mon Sep 17 00:00:00 2001
From: Gustav Wikström
Date: Mon, 22 Feb 2021 23:03:34 +0100
Subject: Speedup crawler by ... making it not crawl!

---
 nroam.el | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/nroam.el b/nroam.el
index bbadffb..74fcbbb 100644
--- a/nroam.el
+++ b/nroam.el
@@ -44,6 +44,7 @@
 (defvar-local nroam-start-marker nil)
 (defvar-local nroam-end-marker nil)
 
+(defvar nroam-work-buffer " nroam-work")
 (defmacro with-nroam-markers (&rest body)
   "Evaluate BODY.
 Make the region inserted by BODY read-only, and marked with
@@ -68,6 +69,7 @@ Make the region inserted by BODY read-only, and marked with
   :keymap nroam-mode-map
   (if nroam-mode
       (progn
+        (nroam--init-work-buffer)
         (add-hook 'before-save-hook #'nroam--prune-backlinks nil t)
         (add-hook 'after-save-hook #'nroam--update-backlinks-maybe nil t)
         (nroam-update-backlinks))
@@ -75,6 +77,12 @@ Make the region inserted by BODY read-only, and marked with
     (remove-hook 'after-save-hook #'nroam--update-backlinks-maybe t)
     (nroam--prune-backlinks)))
 
+(defun nroam--init-work-buffer ()
+  (get-buffer-create nroam-work-buffer t)
+  (with-current-buffer nroam-work-buffer
+    (delay-mode-hooks
+      (org-mode))))
+
 (defun nroam-ctrl-c-ctrl-c ()
   "Update the backlinks for the current buffer, or fallback to `org-ctrl-c-ctrl-c'."
   (interactive)
@@ -198,14 +206,14 @@ Make the region inserted by BODY read-only, and marked with
 
 (defun nroam--crawl-source (file point)
   "Return the source element in FILE at POINT."
-  (with-current-buffer (find-file-noselect file)
-    (save-excursion
-      (goto-char point)
-      (let ((elt (org-element-at-point)))
-        (let ((begin (org-element-property :begin elt))
-              (end (org-element-property :end elt))
-              (type (org-element-type elt)))
-          `(,type . ,(buffer-substring begin end)))))))
+  (with-current-buffer nroam-work-buffer
+    (insert-file-contents file nil nil nil 'replace)
+    (goto-char point)
+    (let ((elt (org-element-at-point)))
+      (let ((begin (org-element-property :begin elt))
+            (end (org-element-property :end elt))
+            (type (org-element-type elt)))
+        `(,type . ,(buffer-substring begin end))))))
 
 (defun nroam--fix-links (content origin)
   "Correct all relative links in CONTENT from ORIGIN.
-- 
cgit v1.3-2-g0d8e


From 4a9159db02829b51e9a7e21bc0f85f734c8e1b64 Mon Sep 17 00:00:00 2001
From: Gustav Wikström
Date: Mon, 22 Feb 2021 23:29:17 +0100
Subject: Readme.org: Performance part not needed due to crawler changes

Crawler doesn't crawl any longer and has no performance issues any
longer, no matter how big the Org roam library.
---
 readme.org | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/readme.org b/readme.org
index ced0d91..d16507d 100644
--- a/readme.org
+++ b/readme.org
@@ -26,8 +26,3 @@ It can also be manually updated by typing =C-c C-c= anywhere in the linked refer
 * Warning
 
 This package is in its infancy. Be careful when using it as it modifies your =org-mode= buffers—it should not modify your files though. Backup your data often.
-
-* Performance
-
-At the moment no caching is done when crawling source files for backlinks so there could be performance issues with very large number of org files as a lot of buffers could have to be open to crawl backlink content.
-
-- 
cgit v1.3-2-g0d8e


From 3a0d7a3696f3bebc4fe117e18d94068443aaca83 Mon Sep 17 00:00:00 2001
From: Gustav Wikström
Date: Tue, 23 Feb 2021 14:37:45 +0100
Subject: Add docstring and empty line

* nroam.el (nroam--init-work-buffer): Add docstring.
---
 nroam.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nroam.el b/nroam.el
index 74fcbbb..5120905 100644
--- a/nroam.el
+++ b/nroam.el
@@ -45,6 +45,7 @@
 (defvar-local nroam-end-marker nil)
 
 (defvar nroam-work-buffer " nroam-work")
+
 (defmacro with-nroam-markers (&rest body)
   "Evaluate BODY.
 Make the region inserted by BODY read-only, and marked with
@@ -78,6 +79,7 @@ Make the region inserted by BODY read-only, and marked with
     (nroam--prune-backlinks)))
 
 (defun nroam--init-work-buffer ()
+  "Initiate nroam hidden buffer."
   (get-buffer-create nroam-work-buffer t)
   (with-current-buffer nroam-work-buffer
     (delay-mode-hooks
-- 
cgit v1.3-2-g0d8e