一起聊一聊emacs27?


#62

那就不清楚了。


#63

Maybe it is fixed by https://github.com/emacs-lsp/lsp-ui/pull/249 but I want to unify the logic here and in the logic used in lsp-describe-thing-at-point.


#64

Good to know that! Thank you, @yyoncho. :+1:


#65

一位中文输入法常年崩溃的坛友


#66

总结精辟。。


#67

崩溃的不只是我一个吧


#68

emacs的json是借用外部的库实现的

并不是从0开始


#69

I upgraded lsp-ui to the latest version, but I don’t know how to enable markdown format for the doc in python-mode. It’s still displayed as plaintext in chlld-frame, but displayed correctly in buffer via lsp-describe-thing-at-point.


#70

Apparently not all the cases are covered. I will try to finally fix that code as part of 6.1 release or at least I will unify it with lsp-mode lsp-describe-thing-at-point . We are now almost done with the lsp spec.


#71

If you are looking for optimization of json parsing you could patch json parsing like that, it speeds up native parsing ~2 times.

static Lisp_Object
json_make_string (const char *data, ptrdiff_t size)
{
  /* return code_convert_string (make_specified_string (data, -1, size, false), */
  /*                             Qutf_8_unix, Qt, false, true, true); */
  return make_specified_string (data, -1, size, false);
}

#72

http://lists.gnu.org/archive/html/bug-gnu-emacs/2019-04/msg01066.html

已经被当成bug汇报了


#73

有一个 commit 对这个做了修复,就是不知道效果怎么样


#74

有改善:

  • emacs-nightly-2019-03-11
(benchmark '100000 '(json-serialize nil))                ;; => Elapsed time: 0.781194s (0.459996s in 22 GCs)
(benchmark '100000 '(json-encode nil))                   ;; => Elapsed time: 0.717249s (0.696107s in 14 GCs)
(benchmark '100000 '(json-serialize [1 2 3 4 5]))        ;; => Elapsed time: 1.151345s (0.485101s in 24 GCs)
(benchmark '100000 '(json-encode [1 2 3 4 5]))           ;; => Elapsed time: 3.946905s (1.711959s in 88 GCs)
(benchmark '100000 '(json-parse-string "[true]"))        ;; => Elapsed time: 0.430584s (0.365047s in 18 GCs)
(benchmark '100000 '(json-read-from-string "[true]"))    ;; => Elapsed time: 3.815848s (2.016469s in 77 GCs)
(benchmark '100000 '(json-parse-string "{}"))            ;; => Elapsed time: 0.939729s (0.807201s in 41 GCs)
(benchmark '100000 '(json-read-from-string "{}"))        ;; => Elapsed time: 2.700354s (1.535654s in 73 GCs)
(benchmark '100000 '(json-parse-string json-string))     ;; => Elapsed time: 28.358048s (15.606600s in 729 GCs)
(benchmark '100000 '(json-read-from-string json-string)) ;; => Elapsed time: 30.516164s (18.759847s in 857 GCs)
  • emacs-nightly-2019-05-05
(benchmark '100000 '(json-serialize nil))                ;; => Elapsed time: 0.691653s (0.346536s in 14 GCs)
(benchmark '100000 '(json-encode nil))                   ;; => Elapsed time: 0.152464s (0.273960s in 14 GCs)
(benchmark '100000 '(json-serialize [1 2 3 4 5]))        ;; => Elapsed time: 0.540319s (0.310708s in 15 GCs)
(benchmark '100000 '(json-encode [1 2 3 4 5]))           ;; => Elapsed time: 5.365478s (2.094981s in 88 GCs)
(benchmark '100000 '(json-parse-string "[true]"))        ;; => Elapsed time: 0.409175s (0.346409s in 18 GCs)
(benchmark '100000 '(json-read-from-string "[true]"))    ;; => Elapsed time: 3.157826s (1.607454s in 77 GCs)
(benchmark '100000 '(json-parse-string "{}"))            ;; => Elapsed time: 1.191392s (1.010268s in 41 GCs)
(benchmark '100000 '(json-read-from-string "{}"))        ;; => Elapsed time: 3.097365s (1.657493s in 73 GCs)
(benchmark '100000 '(json-parse-string json-string))     ;; => Elapsed time: 15.310692s (10.497624s in 496 GCs)
(benchmark '100000 '(json-read-from-string json-string)) ;; => Elapsed time: 31.160639s (18.475476s in 858 GCs)

#75

感觉GC影响很大呀,是不是调下gc-cons-threshold性能更好?


#76

Emacs 27 如果能解决 lsp 卡顿的问题岂不是逆天了?


#77

emacs 26.2和27.0.50用lsp-mode和mspyls写python的代码,感觉2个版本的速度差不多。没什么区别。


#78

我之前用26.2 有点卡,现在用的27.05,基本没有卡的情况很流畅;也可能是我的电脑的问题


#79

27改进了一些backtrace相关的内容,让debug更方便了,比如

echo '(error "Break the core!")' >> ~/.emacs.d/init.el
emacs --debug-init

得到backtrace

会提示你出错的具体在文件的哪个位置。妈妈再也不用担心我改配置多打一个括号了。


#80

Emacs 27 加了一个新的API string-distance, 用C实现的,比Lisp实现快100倍。建议用法(string-distance str1 str2 t)第三个参数是t的话对unicode宽字符不做特殊处理,这样速度更快。

典型应用是查找和当前文件相关的文件,如已打开hello.cpp,找hello.hpp,或从mycomp.jsxmycomp.service.js.


#81

刚刚用上emacs-27.0.50,在windows10,明显感觉要比emacs-26.3要流畅,推荐升27