Elapsed time -- tiny code snippet

[Hal Fulton]

Here's a poor man's profiler -- only good for finding the
time in seconds it took to execute a code block. (I used
this today in a context where I was doing several operations
that invoked external programs and such.)

I put it inside Time just for convenience.


Cheers,
Hal


class Time
def self.elapse
raise "Need block" unless block_given?
t0 = Time.now
yield
Time.now - t0
end
end

secs = Time.elapse { do_something() }

 

[Florian Groß]

Here's a poor man's profiler -- only good for finding the
time in seconds it took to execute a code block. (I used
this today in a context where I was doing several operations
that invoked external programs and such.)

I put it inside Time just for convenience.

class Time
def self.elapse
raise "Need block" unless block_given?
t0 = Time.now
yield
Time.now - t0
end
end

secs = Time.elapse { do_something() }

I'd suggest converting the times to floats (via .to_f) before
subtracting -- it ought to be quite a bit more precise that way.

 

[Trans]

Tried it with and without floats, and yes float give more precision.
But strangely this happens either way:

Time.elapse { sleep 1 } #=> 0.999188899993896

Not 1 or more? Odd.

T.

 

[Lyndon Samson]

Tried it with and without floats, and yes float give more precision.
But strangely this happens either way:

Time.elapse { sleep 1 } #=> 0.999188899993896

Not 1 or more? Odd.

You may find this
http://docs.sun.com/source/806-3568/ncg_goldberg.html interesting
reading.