Force interface more aggressively.
Force interface more aggressively.

For running Haddock on GHC this reduces memory usage by about 50 MB on
a 32 bit system.  A heap profile shows total memory usage peak at
about 100 MB, but actual usage is at around 300 MB even with
compacting GC (+RTS -c).

ghcjs/haddock-internal,ghcjs/haddock-internal