Haskell: The tale of keepAlive#

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The tale of keepAlive#

bgamari - 2021-06-08

In GHC 9.0 we have reworked the primops used for guaranteeing heap object lifetime in the presence of off-heap references. The result is a new primop, keepAlive#, which largely replaces the venerable touch# operation. This post will give some background on touch#, describe the rationale for this change, discuss some of the alternatives that were evaluated on the way to t...

Get the full details here: The tale of keepAlive# — The Glasgow Haskell Compiler