Re: slow startup on windows

They do get displayed but only when the user makes a selection.
If std::string is faster I may be able use std::string instead of
FXString, I'd have to think about it. 

I never knew there was a speed difference.

Js


-----Original Message-----
From: Roland Hughes via Foxgui-users
<[email protected]> 
Sent: Friday, October 25, 2024 6:14 PM
To: [email protected]
Subject: Re: [Foxgui-users] slow startup on windows

So this begs the question.

If the strings are never displayed, why not std::string?

On 10/25/2024 10:43 AM, John Selverian wrote:
> The program is a database where everything is stored as
strings, 
> they're all wrapped in classes, so its actually stored as a 4D
array 
> of classes. When it's running it takes 235 MB in memory.
>
> The strings are not displayed in the UI.
>
> I timed this:
>
> 	FXString* tmp;
> 	long num = 500000;
> 	//long num = 5000000;
> 	for (long i = 0; i < num; i++)
> 	{
> 		tmp = new FXString("test string");
> 		delete tmp;
> 	}
>
> For num = 500,000 it's somewhere around 1 second, for num =
> 5,000,000 takes about 3 seconds. I also used a longer string
("test 
> string test string test string test string test string test
string 
> test string test string ") and saw no effect. I'm just timing
in the 
> debugger with a stopwatch, nothing fancy so the times are only 
> approximate but clearly noticeable.
>
>
> Js
>
>
>
>
>
> -----Original Message-----
> From: [email protected] <[email protected]>
> Sent: Friday, October 25, 2024 10:55 AM
> To: Enno Rehling <[email protected]>
> Cc: [email protected]
> Subject: Re: [Foxgui-users] slow startup on windows
>
> On 2024-10-25 09:27, Enno Rehling wrote:
>> I second what Roland says, don't load all those strings into
> memory,
>> or at least not into FXString objects, if you can at all help
> it.
>
> Definitely true, but we have sh*tloads of ram these days and I
could 
> load the complete works of william shakespeare in RAM and not
remotely 
> tax the amount of memory of even a raspberry pi.
>
> At an average sentence length of 80 bytes, times 500,000 is
only
> 40 MB.
> Size of a single uncompressed 4K image...
>
> It *is* a lot of mallocs() if each of these is an individual
block, 
> each taking perhaps 2000 cycles to allocate, so on a 1GHz CPU
takes 
> around 1 second.
>
> 40MB at modern RAM speeds may take around 1ms to write to RAM,
but it 
> will take less because modern CPUs have L3 caches bigger than
40MB so 
> it'll be all cached.
>
> Basically, there's almost nothing you can do with text that
would even 
> remotely tax a modern machine...
>
>
>     -- JVZ
>
>
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--
Roland Hughes, President
Logikal Solutions
(630)-205-1593  (cell)
https://theminimumyouneedtoknow.com
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