There is a bug which causes many network requests to be made when a websocket connection fails in jsaddle-warp. Tested in Firefox-55 and Chrome-61, the bug only happens in Chrome.
To test in ghc:
nix-build -A ghc.bug
./result/bin/bug-exe
Navigate to localhost:3800, open network tab:
This doesn't happen with the ghcjs build:
nix-build -A ghcjs.bug
Navigate to result/bin/bug-exe.jsexe/index.html, open network tab