Calling Functions Across Languages

on YouTube ↗48m

" summary

Shows how to replace network or process RPC with direct in-process calls using C FFIs so Node.js can call Ruby (and Python, Fortran, etc.), converting JS/Ruby shapes via N-API and Ruby C API to avoid misinterpreted bit patterns. Benchmarks note pipes under 8K are fastest, shared memory wins for larger payloads. Demonstrates a working C shim that converts arrays, explains crash risks (segfaults from layout mismatches) and presents Rock glue as a generator to auto-produce safe bindings instead of hand-writing C.

AI-written summary · about

" chapters (8)

1. 0:00Introduction to cross-language calls
2. 2:26HTTP call from JavaScript to Ruby
3. 11:13Moving to single-process calls
4. 23:25Using C as an intermediary
5. 31:08Making cross-language calls less painful
6. 37:23Generating bindings automatically
7. 44:19Trade-offs of different approaches
8. 48:10Summary and closing

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