Hi everyone,

I’ve just started using Julia and was trying to understand how macros work. I ran two simple tests with the macros devec and parallel and it seems to be getting slower instead of faster. Here are the two simple tests I ran:

First, with @devec:

a = ones(10)

b = ones(10)*5

tic()

@devec c = a.*b

toc()

elapsed time: 0.016007498 seconds

as opposed to

tic()

a.*b

toc()

elapsed time: 0.00013638 seconds.

Similarly,

a = ones(10000)*0.5

tic()

sumOfSquares = @parallel (+) for i in 1:10000

a[i]^2

end

toc()

elapsed time: 0.04703732 seconds

whereas not using the macro with the following code:

tic()

sumOfSquares = 0

for i in 1:10000

sumOfSquares += a[i]^2

end

toc()

elapsed time: 0.007251497 seconds.