Matthew Pickering 35b81f39e9 Memory performance improvements from Cherre (#518) ... * Stop shutdown handler retaining the whole serveCtx This might look like quite a strange way to write the function but it's the only way I could get GHC to not capture `serveCtx` in the shutdown handler. Fixes the metadata issue in #344 * Force argumentNames The arguments list is often empty so we end up with a lot of duplicate thunks if this value is not forced. * Increase sharing in nullableType and nonNullableType The previous definitions would lead to increased allocation as it would destory any previously created sharing. The new definition only allocate a fresh constructor if the value is changed. * Add memoization for field parsers It was observed in #344 that many parsers were not being memoised which led to an increase in memory usage. This patch generalisation memoisation so that it works for FieldParsers as well as normal Parsers. There can still be substantial improvement made by also memoising InputFieldParsers but that is left for future work. Co-authored-by: Antoine Leblanc <antoine@hasura.io> * [automated] stylish-haskell commit * changelog Co-authored-by: Phil Freeman <paf31@cantab.net> Co-authored-by: Antoine Leblanc <antoine@hasura.io> Co-authored-by: Stylish Haskell Bot <stylish-haskell@users.noreply.github.com> Co-authored-by: Phil Freeman <phil@hasura.io> GitOrigin-RevId: 36255f77a47cf283ea61df9d6a4f9138d4e5834c		2021-02-12 01:34:56 +00:00
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Main.hs	Memory performance improvements from Cherre (#518)	2021-02-12 01:34:56 +00:00