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wasm-opcodecnt - Man Page

count opcode usage for instructions


wasm-opcodecnt[options] file ...


wasm-opcodecnt Read a file in the wasm binary format, and count opcode usage for instructions.

The options are as follows:


Print a help message


Print version information

-v, --verbose

Use multiple times for more info


Enable Experimental exception handling


Disable Import/export mutable globals


Disable Saturating float-to-int operators


Disable Sign-extension operators


Disable SIMD support


Enable Threading support


Enable Typed function references


Disable Multi-value


Enable Tail-call support


Disable Bulk-memory operations


Disable Reference types (externref)


Enable Custom annotation syntax


Enable Code metadata


Enable Garbage collection


Enable 64-bit memory


Enable Multi-memory


Enable Extended constant expressions


Enable all features

-o, --output=FILENAME

Output file for the opcode counts, by default use stdout

-c, --cutoff=N

Cutoff for reporting counts less than N

-s, --separator=SEPARATOR

Separator text between element and count when reporting counts


Parse binary file test.wasm and write pcode dist file test.dist

$ wasm-opcodecnt test.wasm -o test.dist

See Also

wasm-decompile(1), wasm-interp(1), wasm-objdump(1), wasm-strip(1), wasm-validate(1), wasm2c(1), wasm2wat(1), wast2json(1), wat-desugar(1), wat2wasm(1), spectest-interp(1)


If you find a bug, please report it at

Referenced By

spectest-interp(1), wasm2c(1), wasm2wat(1), wasm-decompile(1), wasm-interp(1), wasm-objdump(1), wasm-strip(1), wasm-validate(1), wast2json(1), wat2wasm(1), wat-desugar(1).

February 3, 2024