@@ -41,3 +41,15 @@ multi-core parallelism use the following GHC options:
41GHC 8.2.2 may hog memory and hang when building certain application using
41GHC 8.2.2 may hog memory and hang when building certain application using
42streamly (particularly the benchmark programs in the streamly package).
42streamly (particularly the benchmark programs in the streamly package).
43Therefore we recommend avoiding using the GHC version 8.2.x.
43Therefore we recommend avoiding using the GHC version 8.2.x.
45+# Performance Optimizations
47+If performance is below expectations:
49+* Look for inlining functions in the fast path
50+* Strictness annotations on data, specially the data used as accumulator in
51+ folds and scans, can help in improving performance.
52+* Strictness annotations on function arguments can help the compiler unbox
53+ constructors in certain cases, improving performance.
54+* Sometims using `-XStrict` extension can help improve performance, if so you
55+ may be missing some strictness annotations.