Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy

2026-07-20 · 84 min · 25 entities

episode page audio

Asserted relationships

→ references Xavier Leroy person

0.77

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://en.wikipedia.org/wiki/Xavier_Leroy
→ hosted by Ryan Peterman person

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evidence rules-v5
Feed author/publisher: Ryan Peterman
→ discusses Technology company

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evidence rules-v5
Feed category: Technology
→ references developing.dev website

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evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://developing.dev/
→ references @Ryanlpeterman website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://tiktok.com/@ryanlpeterman
→ references Compose Simple Ergonomics Beautifully Done person

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://kickstarter.com/projects/ryanlpeterman/compose-simple-ergonomics-beautifully-done
→ references read.compose.llc company

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://read.compose.llc/
→ references workos.com website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://workos.com/
→ references Creator Of Ocaml Functional Programming person

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://developing.dev/p/creator-of-ocaml-functional-programming
→ references xavierleroy.org website

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evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://xavierleroy.org/
→ references compcert.org website

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evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://compcert.org/
→ references htdp.org website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://htdp.org/

Entities found in this episode

websites 12

mentioned developing.dev website

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://developing.dev/
mentioned @Ryanlpeterman website

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://threads.com/@ryanlpeterman
mentioned workos.com website

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://workos.com/
mentioned xavierleroy.org website

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://xavierleroy.org/
mentioned compcert.org website

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://compcert.org/
mentioned htdp.org website

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://htdp.org/
references developing.dev website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://developing.dev/
references @Ryanlpeterman website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://tiktok.com/@ryanlpeterman
references workos.com website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://workos.com/
references xavierleroy.org website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://xavierleroy.org/
references compcert.org website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://compcert.org/
references htdp.org website

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://htdp.org/

persons 8

mentioned Xavier Leroy person

0.90

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://en.wikipedia.org/wiki/Xavier_Leroy
references Xavier Leroy person

0.77

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://en.wikipedia.org/wiki/Xavier_Leroy
mentioned Ryan Peterman person

0.70

evidence rules-v5
Feed author/publisher: Ryan Peterman
hosted by Ryan Peterman person

0.55

evidence rules-v5
Feed author/publisher: Ryan Peterman
mentioned Compose Simple Ergonomics Beautifully Done person

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://kickstarter.com/projects/ryanlpeterman/compose-simple-ergonomics-beautifully-done
mentioned Creator Of Ocaml Functional Programming person

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://developing.dev/p/creator-of-ocaml-functional-programming
references Compose Simple Ergonomics Beautifully Done person

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://kickstarter.com/projects/ryanlpeterman/compose-simple-ergonomics-beautifully-done
references Creator Of Ocaml Functional Programming person

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://developing.dev/p/creator-of-ocaml-functional-programming

companys 4

mentioned Technology company

0.50

evidence rules-v5
Feed category: Technology
mentioned read.compose.llc company

0.45

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://read.compose.llc/
discusses Technology company

0.40

evidence rules-v5
Feed category: Technology
references read.compose.llc company

0.38

evidence rules-v5
Link in episode "Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy": https://read.compose.llc/

concepts 1

mentioned Functional Programming, Formal Verification, Programming Languages | Xavier Leroy concept

0.42

evidence rules-v5
Creator of OCaml: Functional Programming, Formal Verification, Programming Languages | Xavier Leroy

Episode description as stored

Xavier Leroy (creator of OCaml) is an expert in compilers, formal verification of software and functional programming. This interview should be an approachable resource if you're curious about formal verification of software since I was learning that on the fly during it. • My ergonomic keyboard project I mentioned, you can follow along here: https://read.compose.llc/ • The Kickstarter page for it: https://www.kickstarter.com/projects/ryanlpeterman/compose-simple-ergonomics-beautifully-done Podcast links: • YouTube: https://youtu.be/9Cswiqrq6So • Apple: https://podcasts.apple.com/us/podcast/the-peterman-pod/id1777363835 • Transcript: https://www.developing.dev/p/creator-of-ocaml-functional-programming Thank you to this episode's sponsor for supporting my work: • WorkOS: makes your app Enterprise Ready with easy to use APIs to add SSO, SCIM, RBAC, and more in just a few lines of code, check them out at https://workos.com/ Timestamps: (00:00) Intro (00:43) What sets OCaml apart (04:39) OCaml vs Rust (07:57) Why is manual memory management more performant (11:21) Javascript vs OCaml (14:00) Famous Rob Pike quote (16:05) Type inference and how it works (22:12) What is formal verification and how does it work (40:07) What made multicore support difficult for OCaml (50:17) How programming languages interface and call each other (57:41) The danger of almost-correct LLM code (01:05:39) How LLMs will change programming languages (01:10:26) Industry vs academia (01:15:05) Most interesting unsolved problems (01:18:30) Top book recommendations for engineers (01:21:17) Advice for his younger self (01:23:31) Outro Where to find Xavier: • Wikipedia: https://en.wikipedia.org/wiki/Xavier_Leroy • Website: https://xavierleroy.org/ Where to find Ryan: • Newsletter: https://www.developing.dev/ • X/Twitter: https://x.com/ryanlpeterman • LinkedIn: https://www.linkedin.com/in/ryanlpeterman/ • Threads: https://www.threads.com/@ryanlpeterman • Instagram: https://www.instagram.com/ryanlpeterman • TikTok: https://www.tiktok.com/@ryanlpeterman Referenced in this episode: • CompCert verified C compiler: https://compcert.org/ • seL4 microkernel: https://sel4.systems/ • Programming Pearls (book, not an affiliate link): https://www.amazon.com/dp/0201657880 • How to Design Programs (book): https://htdp.org/