Henning: I suggest you read the gmp source and tell us :)<span></span><br><br>On Saturday, June 18, 2016, Henning Thielemann &lt;<a href="mailto:lemming@henning-thielemann.de">lemming@henning-thielemann.de</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
In my set-cover package I make extensive use of bit vectors. I tested both IntSet and Integer for this purpose. In GHC-7.4.2 Integer was visibly faster than IntSet, but in GHC-7.8.4 and later, IntSet clearly wins over Integer. I guess this can be attributed to IntSet using BitMaps at the leaves since containers-0.5. However, on a 64-bit machine a BitMap is a Word64. I wondered whether we could get further speedup by using a vector type. E.g. AVX processors could perform bit manipulations on 256 bit words. Do the bit operations on Integer make use of vector instructions?<br>
_______________________________________________<br>
Libraries mailing list<br>
<a>Libraries@haskell.org</a><br>
<a href="http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries" target="_blank">http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries</a><br>
</blockquote>