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+---
+title: "Data 'pickling' in the F# compiler"
+preview: "Data 'pickling' in the F# compiler"
+isDraft: true
+date: 2025-03-28T14:00:00.000Z
+id: "2025/03/28"
+champion: "Petr Semkin"
+zoomLink: "https://us06web.zoom.us/j/88634727094?pwd=odJCovtHmlrbepkgXgw57MbiE9qPPu.1"
+zoomPasscode: "typecheck"
+issueLink: "https://github.com/dotnet/fsharp/blob/main/src/Compiler/TypedTree/TypedTreePickle.fs"
+company: "Microsoft"
+youtubeId: ""
+---
+
+## Topic
+
+In this session, we will discuss data serialization (aka 'pickling') in the F# compiler - how F# code is stored on the disc. The talk will also touch on the topic of [reusing typecheck results between compiler runs](https://github.com/dotnet/fsharp/blob/main/docs/reusing-typechecking-results.md), the feature which is supposed to add logic there.
+which aims to improve the performance of the F# compiler by reusing the results of typechecking between compiler runs.
+
+## Champion
+
+- [Petr Semkin](https://twitter.com/psfinaki)