Measuring Execution time

[Steven Schveighoffer via Digitalmars-d-learn]

On 7/22/15 5:23 AM, Clayton wrote:
> How does one represent Duration in only Micro-seconds, or milliseconds.
> Trying to measure the execution time of an algorithm and I get "4 ms,
> 619 μs, and 8 hnsecs" , I want to sum all these and get total hnsecs or
> μs .
>
> I would also  appreciate advise on  whether this is the best way to
> measure the execution time of an algorithm.
>
>
>
> import std.datetime;
> import std.stdio;
>
> void algorithm( ){
>      writeln("Hello!");
> }
> void main(){
>
>          auto stattime = Clock.currTime();
>      algorithm( );
>      endttime = Clock.currTime();
>
>      auto duration = endttime - stattime;
>
>      writeln("Hello Duration ==> ", duration);
>
> }

I know John identified Stopwatch, but just an FYI, Duration has the 
method total: http://dlang.org/phobos/core_time.html#.Duration.total

I think doing:

writeln("Hello Duration ==> ", duration.total!"usecs");

would also work.

-Steve