Re: Efficent lens operation for Data.Map et al.

On Wed, Jan 18, 2012 at 1:51 PM, Roman Cheplyaka wrote:

* roconnor@theorem.ca [2012-01-18 16:35:52-0500]

...

On Wed, 18 Jan 2012, Johan Tibell wrote:

...

IIRC you just replace the current functions with yours and run make in the benchmarks/ directory to compile the benchmark binaries (which use Criterion). Then simply run them.

I got an error trying to build the benchmarks:

Worked for me with GHC 7.0.4.

The results are attached.

In short, your version is indeed typically slower, up to a factor of 5 (for lookup).

That's even slower than I expected. Doesn't mean that we cannot add the operation though (although we should think about exactly which operation(s) we need.) -- Johan