Re: [boost] [iterator] huge differences in compile time between iterator_facade and iterator helpers

26 Oct 2005


      David Abrahams <dave@boost-consulting.com> writes:
...
Now, here's the interesting thing: If you change the needless
postincrement you're using into preincrement, you get:
GCC 3.4.4:
  Test 1 discarded
Test 2
    with operator library: 1.485
    with iterator library: 1.453
Test 3
    with operator library: 1.437
    with iterator library: 1.453
When I do the same to your test (slightly modified; see enclosed) I
get:

  MSVC-6.0

    using iterator lib: ----
    using iterator lib: 8.812
    using iterator lib: 8.797

    using operator lib: -----
    using operator lib: 5.688
    using operator lib: 5.703

  GCC-3.4.4

    using operator lib: -----
    using operator lib: 4.844
    using operator lib: 4.859


    using iterator lib: ----
    using iterator lib: 4.86
    using iterator lib: 4.875

So it looks like the penalty is elsewhere for vc6


-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com