Improve passing buffer to wasm

[kylebarron]

Refs:

• Improve passing buffer to wasm domoritz/arrow-wasm#17
• need example of sharing memory between JS and Rust rustwasm/wasm-bindgen#2456
• support passing ArrayBuffer to wasm module rustwasm/wasm-bindgen#1961
• Add an unsafe method Uint8Array::view_mut_raw(ptr: *mut u8, length: usize) so that JS can efficiently initialize a wasm buffer rustwasm/wasm-bindgen#1643
• mstange/profiler-get-symbols@03507a7
• Allow creating and writing directly to buffers in wasm memory from JS rustwasm/wasm-bindgen#1079

[kylebarron]

I don't think it's possible to improve perf above what wasm-bindgen is already doing... allocating space on the rust side and copying the data over. Since rust can't read JS memory directly