Avoiding The Laziness Tax
Stc
Date: 2007-01-25
Time: 11:45
Room: BBL room 471
Speaker: Alexey Rodriguez Yakushev
Title: Avoiding the laziness tax
Abstract
The Glasgow Haskell Compiler (GHC) implements laziness using the
STG machine design. Though this design was appropriate when it
was conceived, in my talk I will show that it performs badly under
modern CPU architectures. I will describe the design currently in use
and the changes that you can make to it to avoid the indirect jumps
implementing lazy evaluation, which are at the root of severely
decreased performance.
