cider-eldoc-beginning-of-sexp is slow in large buffers #1820
Description
cider-eldoc-beginning-of-sexp can cause Emacs to hang / freeze when visiting large buffers.
Test file (adjust the range end to taste):
(->>
(map #(hash-map :foo % :bar %) (range 1 300000))
clojure.pprint/pprint
with-out-str
(spit "test.edn"))Visit the resulting test.edn file with cider-mode and eldoc-mode enabled and a repl session running, then jump from the beginning of the buffer to the end of the buffer. On my system, this causes Emacs to freeze. Disabling cider-mode is not enough as the cider-eldoc functions are still called even after cider-mode has been disabled for the buffer (is this expected?). Eldoc must be disabled or the repl session must be terminated before performance will return to normal.
This appears similar to what was addressed in #1502
Profile report:
- redisplay_internal (C function) 10809 100%
- debug 10809 100%
- recursive-edit 10797 99%
- timer-event-handler 10625 98%
- apply 10625 98%
- #<compiled 0x400e5859> 10623 98%
- eldoc-print-current-symbol-info 10623 98%
- cider-eldoc 10623 98%
- cider-eldoc-info-in-current-sexp 10623 98%
- cider-eldoc-info-at-point 5424 50%
- cider-eldoc-beginning-of-sexp 5424 50%
forward-sexp 5423 50%
- cider-eldoc-info-at-sexp-beginning 5199 48%
- cider-eldoc-beginning-of-sexp 5199 48%
forward-sexp 5199 48%
+ show-paren-function 2 0%
+ command-execute 160 1%
+ ... 0 0%
Environment & Version information
CIDER version information
;; CIDER 0.14.0snapshot (package: 20160806.2354), nREPL 0.2.12
;; Clojure 1.8.0, Java 1.8.0_40
Lein/Boot version
Leiningen 2.6.1 on Java 1.8.0_40 Java HotSpot(TM) 64-Bit Server VM
Emacs version
GNU Emacs 25.1.1 (x86_64-apple-darwin15.6.0, NS appkit-1404.47 Version 10.11.6 (Build 15G31)) of 2016-07-29
Operating system
Mac OS X 10.11.6