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* Lexical binding: why?
@ 2019-05-28 10:08 Alan Mackenzie
  2019-05-28 12:01 ` Tadeus Prastowo
                   ` (2 more replies)
  0 siblings, 3 replies; 11+ messages in thread
From: Alan Mackenzie @ 2019-05-28 10:08 UTC (permalink / raw)
  To: emacs-devel

Hello, Emacs.

What is the purpose of converting Lisp files to use lexical binding?

I always thought the idea was to speed the SW up.  However, when I tried
converting CC Mode to lexical binding, I got the following timings for
two of my personal benchmarks:

                  Dynamic binding             Lexical binding

Benchmark 1           7.249s                      7.423s 

Benchmark 2          16.743s                     16.691s

.  I thus see no speedup from the use of lexical binding.

Have I, perhaps, made some mistake somewhere?  Does anybody else see
significant speed increases through the use of lexical binding?

-- 
Alan Mackenzie (Nuremberg, Germany).



^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2019-05-28 17:58 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-05-28 10:08 Lexical binding: why? Alan Mackenzie
2019-05-28 12:01 ` Tadeus Prastowo
2019-05-28 12:26 ` Stefan Monnier
2019-05-28 13:02   ` Dmitry Gutov
2019-05-28 13:25     ` Stefan Monnier
2019-05-28 13:46       ` Dmitry Gutov
2019-05-28 13:44   ` Alan Mackenzie
2019-05-28 17:21     ` Stefan Monnier
2019-05-28 17:41       ` Alan Mackenzie
2019-05-28 17:58         ` Stefan Monnier
2019-05-28 15:19 ` John Wiegley

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