Hi Dirk,
> inlines uses .Call, so there is a slight logical problem here... And yes,
What is the logical problem?
> functions have overheads.
If that is the case, .Call("test", xx) should be faster than test(xx).
But it is not (see below). This looks wired to me.
>
> | library(microbenchmark)
> | microbenchmark(test(xx))
> | microbenchmark(test_inline(xx))
> | microbenchmark(.Call('test', xx))
>
> The normal idiom is a _single_ call so that you can compare:
>
> microbenchmark(test(xx), test_inline(xx), .Call('test', xx))
Here is the output.
> microbenchmark(test(xx), test_inline(xx), .Call('test', xx))
Unit: microseconds
expr min lq
median uq
max
1 .Call("test", xx) 94.831999999999993633537 96.090499999999991587174
97.557000000000002160050 99.762499999999988631316
128.83099999999998885869
2 test_inline(xx) 4.440000000000000390799 5.101499999999999701572
6.393000000000000682121 6.615000000000000213163
30.33899999999999863576
3 test(xx) 69.683000000000006934897 70.387500000000002842171
71.593500000000005911716 73.153500000000008185452
198.30899999999999749889
--
Regards,
Peng
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