Hey Julianners,

What can be the difference, that makes @time and @btime time different time in these scenarios?

```
a, b = 6, 7
foo(a, b) = begin
for i = 1:2
a, b=a + 6, b + 7+i
end
end
@time foo(a,b)
@time foo(a,b)
@btime $foo($a,$b)
```

It gives:

```
0.008822 seconds (17.17 k allocations: 1.149 MiB, 99.61% compilation time)
0.000004 seconds (1 allocation: 32 bytes)
1.555 ns (0 allocations: 0 bytes)
```

I know there is an allocation for the tuple return a,b… but why doesn’t `@btime`

shows it? Or is it elliminated in some optimisation process?

I used @btime in one of my project that showed I eliminated one allocation this way in a speed intensive unit and not sure if it is just a mistake of the timing or there are still allocations?

Thank you for the answer!