I'm on an i5 first gen and when it opens it immediately pegs one of my cores to 100% -- and pretty much stays that way, making Emacs very, very slow and bogged down. The file is ~ 20,000 lines and weighs under 1 mg, so, yeah, it shouldn't be a problem. Starting with no-init does clear up the issue; works fine.
Now, what in my init would be causing this incompatibility? I got a ready-made .emacs.d from "Clojure for the Brrave and True." Here's what I've got installed.
auctex 11.88.2 installed Integrated environment for *TeX*
cider 20150208.850 installed Clojure Integrated Development Environment and REPL
clojure-mode 20150113.1048 installed Major mode for Clojure code
clojure-mode-ex... 20150110.505 installed Extra font-locking for Clojure mode
dash 20141220.1452 installed A modern list library for Emacs
epl 20140823.609 installed Emacs Package Library
exec-path-from-... 20141212.846 installed Get environment variables such as $PATH from the shell
git-commit-mode 20141014.1634 installed Major mode for editing git commit messages
git-rebase-mode 20150122.1114 installed Major mode for editing git rebase files
gnuplot-mode 20131203.2159 installed Major mode for editing gnuplot scripts
ido-ubiquitous 20141210.1353 installed Use ido (nearly) everywhere.
magit 20150124.930 installed control Git from Emacs
ob-sml 0.2 installed org-babel functions for template evaluation
org 20150202 installed Outline-based notes management and organizer
org-plus-contrib 20150202 installed Outline-based notes management and organizer
paredit 20150126.155 installed minor mode for editing parentheses
pkg-info 20140610.630 installed Information about packages
projectile 20150201.1134 installed Manage and navigate projects in Emacs easily
queue 0.1.1 installed Queue data structure
rainbow-delimiters 1.3.21 installed Highlight nested parens, brackets, braces a different color at each depth.
s 20140910.334 installed The long lost Emacs string manipulation library.
smex 20141210.1422 installed M-x interface with Ido-style fuzzy matching.
sml-mode 6.5 installed Major mode for editing (Standard) ML
tagedit 20141021.2139 installed Some paredit-like features for html-mode
Does anyone have an orgmode-friendly init they could point me at?