Making "read from file" less blocky.

dsc at swcp.com dsc at swcp.com
Sun Aug 4 15:22:00 EDT 2019


More "really out there".

I like the idea of trying to speed up an upfront foreground load. Something simple like this:

put blah-plah into IntoThisVariable.

where blah-blah is nana-nana or decompress( nana-nana ) 
where nana-nana is one of these:
	URL ("binfile:" & ThisFile)
	shell("cat " & ThisFile)

Function decompress() makes two RAM hits and requires control over the loaded files. 


> On Aug 4, 2019, at 12:47 PM, Dar Scott Consulting via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> I love "really out there".  I wanna play.
> 
> At the start of any solution, try this. It might speed up any method but would take some time at the start.
> 
> get shell( "cat " & ThisFile & " > dev/null" )
> 
> I think that is likely to pre-load the system file buffers for you. 
> 
> If one is feeling adventurous, one can try open process (cat) to avoid the wait; it will probably move through the file faster than the script and sectors will already be loaded when you ask for them.
> 
> Dar
> 
>> On Aug 4, 2019, at 7:59 AM, Alex Tweedly via use-livecode <use-livecode at lists.runrev.com> wrote:
>> 
>> OK, here's a "really out there" suggestion ....
>> 
>> 1. Run a local web server  to serve files (locally only).
>> 
>>     Can be done various ways, including (easily) via LC and the httpd library,
>> 
>>        (build that server as a standalone and have it running - started from your app if need be...)
>> 
>> 2. in your stack, just do
>> 
>>  load url ("http://localhost:8080/myfilename") with message "mycallback"
>> 
>> and handle the file once it has been read in the "mycallback" handler
>> 
>> -- Alex.
>> 
>> 
>> On 04/08/2019 01:56, Tom Glod via use-livecode wrote:
>>> Hey folks,
>>> 
>>> I'm having trouble finding a combination of settings that allows my file
>>> loading  to seem to happen in the background.
>>> 
>>>  repeat while read_result is not "eof"
>>>         read from file ThisFile for (1024 * 1000) bytes
>>>         put the result into read_result
>>>         put it after IntoThisVariable
>>>         add length(it) to amount_read
>>>         TSTProgress amount_read,ExpectedSize,"%","Loading File ..."
>>> (Progress Indicator Handler)
>>>         wait 10 milliseconds with messages
>>>      end repeat
>>> 
>>> no matter what I try, its still sluggish, and it seems like messages are
>>> still accumilating instead of being processed by the engine.
>>> 
>>> Am I missing something?  Normally waiting with messages sufficiently frees
>>> the engine to allow the UI to remain responsive.
>>> 
>>> Thanks,
>>> 
>>> Tom
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> 
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