GHC 8.0.* is slow when run on Windows 10 Ubuntu subsystem

I have tried both 8.0.1 and 8.0.2 versions of GHC. 7.10.3 runs just fine. Installation process is also much faster for 7.10.3, later versions have taken around 4 hours to be installed.

Programs compiled with slow GHC are also slow. Sample program:

main = putStrLn "Hello, world!"

GHC is installed with Stack.

Windows version is 1607 build 15031.0 I believe this could be a bug in implementation of Ubuntu subsystem, but I'm not quite sure what part of it is failing.

$ time stack ghc -- -e 'putStrLn ""'

real    2m28.240s
user    0m0.375s
sys     3m30.078s

$ time stack ghc -- --version
The Glorious Glasgow Haskell Compilation System, version 8.0.2

real    1m45.533s
user    0m0.125s
sys     2m46.516s

time stack ghc --compiler ghc-8.0.1 -- --version
The Glorious Glasgow Haskell Compilation System, version 8.0.1

real    2m54.764s
user    0m0.234s
sys     3m58.422s

$ time ghc -e 'putStrLn ""'

real    0m0.872s
user    0m0.109s
sys     0m0.125s

$ time ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.6.3

real    0m0.072s
user    0m0.000s
sys     0m0.031s

time stack ghc --compiler ghc-7.10.3 -- -e 'putStrLn ""'

real    0m0.876s
user    0m0.234s
sys     0m0.688s

time stack ghc --compiler ghc-7.10.3 -- --version
The Glorious Glasgow Haskell Compilation System, version 7.10.3

real    0m0.832s
user    0m0.109s
sys     0m0.813s

$ echo 'main = putStrLn "Hello, world!"' > test.hs
$ time stack ghc --compiler ghc-8.0.2 -- test
[1 of 1] Compiling Main             ( test.hs, test.o )
Linking test ...

real    3m56.582s
user    0m0.609s
sys     5m8.125s

$ time ./test
Hello, world!

real    0m27.540s
user    0m0.000s
sys     0m27.297s

$ echo 'main = putStrLn "Hello, world!"' > test.hs
$ time stack ghc --compiler ghc-7.10.3 -- test
[1 of 1] Compiling Main             ( test.hs, test.o )
Linking test ...

real    0m2.222s
user    0m0.406s
sys     0m1.406s

$ time ./test
Hello, world!

real    0m0.030s
user    0m0.000s
sys     0m0.031s

Part of Stack output with timings:

$ stack ghc --verbose -- -e 'putStrLn "Hello, world!"'
Version 1.3.2, Git revision 3f675146590da4f3edf768b89355f798229da2a5 (4395 commits) x86_64 hpack-0.15.0
...
2017-02-19 21:13:05.756085: [debug] No project config file found, using defaults.
2017-02-19 21:13:05.759402: [debug] Run from outside a project, using implicit global project config
2017-02-19 21:13:05.761724: [debug] Using resolver: lts-8.0 from implicit global project's config file: /home/sukhmel/.stack/global-project/stack.yaml
...
2017-02-19 21:13:05.788855: [debug] Run process: /sbin/ldconfig -p
2017-02-19 21:13:05.816489: [debug] Process finished in 26ms: /sbin/ldconfig -p
2017-02-19 21:13:05.820648: [debug] Run process: /usr/bin/gcc -v
2017-02-19 21:13:05.844975: [debug] Process finished in 23ms: /usr/bin/gcc -v
...
2017-02-19 21:13:05.854997: [debug] Using standard GHC build
2017-02-19 21:13:05.856774: [debug] Getting global package database location
...
2017-02-19 21:13:05.867711: [debug] Run process: /home/sukhmel/.stack/programs/x86_64-linux/ghc-8.0.2/bin/ghc-pkg --no-user-package-db list --global
2017-02-19 21:13:05.888957: [debug] Run process: /home/sukhmel/.stack/programs/x86_64-linux/ghc-8.0.2/bin/ghc --numeric-version
2017-02-19 21:13:05.919968: [debug] Run process: /home/sukhmel/.stack/programs/x86_64-linux/ghc-8.0.2/bin/ghc-pkg --no-user-package-db field --simple-output Cabal version
2017-02-19 21:13:38.605653: [debug] Process finished in 32736ms: /home/sukhmel/.stack/programs/x86_64-linux/ghc-8.0.2/bin/ghc-pkg --no-user-package-db list --global
2017-02-19 21:14:11.930034: [debug] Process finished in 32792ms: /home/sukhmel/.stack/programs/x86_64-linux/ghc-8.0.2/bin/ghc-pkg --no-user-package-db field --simple-output Cabal version
2017-02-19 21:14:11.931071: [debug] Process finished in 32831ms: /home/sukhmel/.stack/programs/x86_64-linux/ghc-8.0.2/bin/ghc --numeric-version
...
2017-02-19 21:14:11.939817: [debug] Run process: /home/sukhmel/.stack/programs/x86_64-linux/ghc-8.0.2/bin/ghc -e "putStrLn \"Hello, world!\""

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
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Related
Blocking
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Operating system
Architecture