GHC compiler is extremely slow

The relatively simple expression

begin push 1 push 2 push 3 push 4 push 5 push 6 push 7 push 8 push 9 push 10

add add add add add add add add add end

takes 5.6 seconds to compile (with no optimizations). Adding one more push 11 and one more add blows the GHC compilation time to 19.2 seconds, the 3-time increase

Wow adding up 10 numbers can take 20 seconds? I though haskell was supposed to be efficient

Haskell is a bloated mess.