put URL

[Richard Gaskin]

Peter Haworth wrote:
> The dictionary says all actions that refer to a URL are blocking but if I
> execute:
>
> put URL myURL into tResults
>
> ... my handler immediately goes to the next statement and tResuls contains
> "error URL is currently loading".
>
> The url is question is to an api so I guess the error could be coming from
> there but all the error messages I've received have been wrapped in XML.

We really need some clarity on this.  I've been using LC for years, but 
whatever rules might allow me to anticipate whether network I/O is 
blocking or non-blocking have eluded me in practice.

These days I almost always rely on callbacks, since I know those are 
always non-blocking, though even then I'm not sure of the implications 
in terms of overall performance, given that it provides us the illusion 
of concurrency but without true parallelism.

Could someone on the core team draft a page that would help us 
understand network I/O in terms of blocking and non-blocking, and how 
non-blocking code is handled in a single-threaded engine?

-- 
  Richard Gaskin
  Fourth World Systems
  Software Design and Development for the Desktop, Mobile, and the Web
  ____________________________________________________________________
  Ambassador at FourthWorld.com                http://www.FourthWorld.com