wasm-overhead-research/results/engine-overhead.csv

1	Ecosystem	Package Manager	Core SDK Package(s)	Core SDK Size (Est.)	Key Dependencies & Rationale	Dependencies Size (Est.)	Total Estimated Overhead	Architectural Model
2	Python	PyPI	extism	~11.4 kB	cffi (FFI to libextism) + libextism (Core Runtime)	~200 kB + 5.5 MB	~5.7 MB	libextism + FFI
3	JavaScript/TS	NPM / JSR	@extism/extism	~2.12 MB	None (Bundles Wasm kernel)	0	~2.12 MB	Native Runtime (V8 etc.)
4	Rust	Crates.io	extism	~72.1 kB	libextism-sys (static link)	Included in final binary	Varies (Statically Linked)	libextism (Static)
5	.NET (C#/F#)	NuGet	Extism.Sdk + Extism.runtime.all	~93 kB + ~15 kB	libextism (Bundled in runtime pkg)	~5.5 MB	~5.6 MB	libextism + P/Invoke
6	Go	Go Modules	github.com/extism/go-sdk	N/A	wazero (Native Wasm Runtime)	N/A	N/A (Pure Go)	Native Runtime (wazero)
7	Java (Standard)	Maven	org.extism.sdk:extism	N/A	JNA (FFI) + libextism (Core Runtime)	~1.5 MB + 5.5 MB	~7.0 MB	libextism + FFI (JNA)
8	Java (Chicory)	Maven	org.extism.sdk:chicory-sdk	~68 kB	Chicory Runtime (Pure Java)	N/A	~68 kB + Deps	Native Runtime (Chicory)
9	Ruby	RubyGems	extism	~4.13 MB	ffi (FFI to libextism)	~600 kB	~4.73 MB	libextism + FFI
10	Elixir	Hex	extism	N/A	rustler (Rust NIFs) + Rust Toolchain	N/A	N/A (Compiles at build)	libextism (NIF)
11	PHP	Packagist	extism/extism	N/A	FFI (built-in) + libextism	5.5 MB	~5.5 MB	libextism + FFI
12	Haskell	Hackage	extism	N/A	FFI packages + libextism	5.5 MB	~5.5 MB + Deps	libextism + FFI
13	OCaml	opam	extism	N/A	ctypes (FFI) + libextism	5.5 MB	~5.5 MB + Deps	libextism + FFI
14	Perl	CPAN	Extism	~1.0 MB	libextism (via Alien::libextism)	~5.5 MB	~6.5 MB	libextism + FFI (XS)
15	Zig	N/A	extism/zig-sdk	N/A	libextism (links against C ABI)	5.5 MB	~5.5 MB	libextism + C Import