Re: Execution speed

[Phil Sainty]

Using npostavs's code:

     | DYNAMIC   | interpreted              | compiled
--------------------------------------------------------------------
25.2 | recursive | 1.55s                    | 0.94s
     | iterative | 1.70s                    | 1.06s
--------------------------------------------------------------------
25.1 | recursive | 1.53s                    | 0.95s
     | iterative | 1.87s                    | 1.06s
--------------------------------------------------------------------
24.5 | recursive | 1.65s                    | 1.24s
     | iterative | 1.43s                    | 0.95s
--------------------------------------------------------------------
24.4 | recursive | 1.78s                    | 1.25s
     | iterative | 1.59s                    | 1.02s
--------------------------------------------------------------------


     | LEXICAL   | interpreted              | compiled
--------------------------------------------------------------------
25.2 | recursive | 4.27s (2.22s in 506 GCs) | 0.64s (0.03s in 6 GCs)
     | iterative | 1.56s (0.10s in 23 GCs)  | 0.49s (0.03s in 6 GCs)
--------------------------------------------------------------------
25.1 | recursive | 4.26s (2.21s in 506 GCs) | 0.64s (0.03s in 6 GCs)
     | iterative | 1.58s (0.10s in 23 GCs)  | 0.50s (0.03s in 6 GCs)
--------------------------------------------------------------------
24.5 | recursive | 4.11s (2.14s in 507 GCs) | 0.92s (0.03s in 6 GCs)
     | iterative | 1.57s (0.09s in 22 GCs)  | 0.84s (0.03s in 7 GCs)
--------------------------------------------------------------------
24.4 | recursive | 4.20s (2.08s in 506 GCs) | 0.91s (0.03s in 6 GCs)
     | iterative | 1.65s (0.10s in 23 GCs)  | 0.82s (0.03s in 6 GCs)
--------------------------------------------------------------------


Running as:

emacs -Q --batch -l /tmp/gcd-benchmark-dynamic.el --eval '(progn
(gcd-dynamic-benchmarks) (princ (buffer-string)))'

emacs -Q --batch -l /tmp/gcd-benchmark-lexical.el --eval '(progn
(gcd-lexical-benchmarks) (princ (buffer-string)))'





On 20/03/17 08:09, address@hidden wrote:
> On Sun, Mar 19, 2017 at 11:12 AM, Stefan Monnier <address@hidden> wrote:
> 
>> the other one is my locally built&hacked version with debugging
>> assertions and stuff.
> 
> Is that the one that sets lexical-binding always?  According to my
> measurements, the iterative case is slower on Emacs 25 when using
> dynamic binding.  With lexical binding, the recursive case is always
> slower.
> 
> (Note the measurements below are using unoptimized -O0 builds, with
> extra checking enabled)
> 
> GNU Emacs 24.5.5 (x86_64-unknown-linux-gnu, X toolkit) of 2017-02-12 on zony
> 
> | DYNAMIC   | interpreted | compiled |
> |-----------+-------------+----------|
> | recursive | 7.64s       | 5.61s    |
> | iterative | 7.91s       | 4.24s    |
> 
> | LEXICAL   | interpreted                | compiled               |
> |-----------+----------------------------+------------------------|
> | recursive | 21.82s (12.20s in 470 GCs) | 4.73s (0.15s in 6 GCs) |
> | iterative |  8.87s  (0.54s in  21 GCs) | 3.14s (0.15s in 6 GCs) |
> 
> GNU Emacs 25.2.6 (x86_64-unknown-linux-gnu, X toolkit) of 2017-03-01
> 
> | DYNAMIC   | interpreted | compiled |
> |-----------+-------------+----------|
> | recursive | 10.58s      | 6.39s    |
> | iterative | 14.05s      | 6.72s    |
> 
> | LEXICAL   | interpreted                | compiled               |
> |-----------+----------------------------+------------------------|
> | recursive | 35.44s (20.56s in 448 GCs) | 4.35s (0.28s in 6 GCs) |
> | iterative | 13.20s ( 0.92s in  20 GCs) | 2.96s (0.23s in 5 GCs) |
> 
>