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Posted by jpluimers on 2019/02/07
Wow, impressive work, and a very good explanation of some of the optimizations that take place and how you can check which ones work on your code: [WayBack] Why the New V8 is so Damn Fast – NodeSource:
The entire V8 compiler pipeline was overhauled and shipped with Node.js version 8. This post investigates what speed improvements we can expect as a result.
Via: [WayBack] Adrian Marius Popa – Google+
–jeroen
Posted in Development, JavaScript/ECMAScript, Node.js, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2019/02/07
Food for thought, especially on the UX side of software: [WayBack] Why you should always do documentation before development | Opensource.com.
Via:
–jeroen
Posted in Development, Software Development, User Experience | Leave a Comment »
Posted by jpluimers on 2019/02/07
Managing TLS correctly with all kinds of dynamic storage seems to be a nightmare.
From what I think it’s safe to use a TStopWatch [WayBack] System.Diagnostics.TStopwatch (introduced in Delphi XE2) as threadvar (which gets into TLS: Thread-local storage) because it’s a record type and as a bonus will be zero-initialised in something like this:
threadvar
ThreadStopwatch: TStopwatch; // threadvars are zero-initialised, like TStopwatch.Reset was called. Ensure TStopwatch.InitStopwatchType called before using this.
... thread code:
var
lThreadElapsedMilliseconds: string;
begin
...
if not ThreadStopwatch.IsRunning then
ThreadStopwatch.Start;
try
lThreadElapsedMilliseconds := ThreadStopwatch.ElapsedMilliseconds.ToString();
// log duration of call-to-call somewhere
... logic
lThreadElapsedMilliseconds := ThreadStopwatch.ElapsedMilliseconds.ToString();
// log duration of logic somewhere
finally
ThreadStopwatch := TStopwatch.StartNew; // resets new count
end;
As long as I perform this in the main thread somwehere to pre-initialise the class variable, then no thread should have the penalty for that:
TStopwatch.Create(); // ensures non-public TStopwatch.InitStopwatchType is called, enabling the threadvar ThreadStopwatch get the penalty for that
If I ever need to dig deeper into TLS with Delphi, then these are starters:
–jeroen
Posted in Delphi, Development, Software Development | Leave a Comment »
