Re: make_ini and autoload

["G. Milde" <g.milde@xxxxxx>]

On 10.05.06, John E. Davis wrote:
> Marko Mahnic <marko.mahnic@xxxxxxxx> wrote:

> >To speed things up you can rewrite it as
> >
> >   loop(5) { "M:\\jed\\libjmr\\csvutils.sl"; autoload(); }
> 
> I think that a cleaner approach would be to use array_map:
> 
>    array_map (Void_Type, &autoload, 
>               ["buffer_compress", "spaces2tab", "format_table",
> 	       "goto_max_column", "format_table_rect"],
> 	      "M:\\jed\\libjmr\\csvutils.sl");

This looks promising but is not significantly faster:

"100 times _autoload(10)" 0.007
"1000 times autoload"     0.016 

"100 times autoloads"  0.015 "(original version with 10 functions)" 
"100 times autoloads2" 0.014 "(speedy version with 10 functions)" 

"100 times array_map"  0.013 "(array_map calling 10 autoloads)" 

(system time measured with tic() toc(), variations due to system load occure)

The real improvement comes with _autoload(). 

Thus, ini.sl will continue using the form

  "fun", "file";
  "fun2", "file";
  ...
  "funN", "file";
  _autoload(N);

However, the syntax is inconvenient if you have a bunch of autoloads from
one file. This is no problem with the auto-generated ini.sl but not so
nice in a mode relying on a number of autoloads. Also, the necessity to
explicitely state the number of argument-pairs makes it error-prone in
case the number of needed autoloads changes during the development of a
mode.

So, here is my feature request for an improved autoload():

 SYNOPSIS
  Load functions from a file

 USAGE
  autoload(String funct, [String funct2 , ...], String file);
  
 DESCRIPTION
  The `autoload' function is used to declare a variable number of
  functions `funct' to the interpreter and indicate that they should be
  loaded from `file' when actually used. 
  ...


Guenter


-- 
Milde ife.et.tu-dresden.de

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