Port `arraybuffer` to ruby

require "js"

response = JS.global.fetch("<dumped buffer's url>").await
puts response[:status]

arraybuffer = response.arrayBuffer.await

# Expected goal:
#   Marshal.load(arraybuffer)

some byte arrays need to port ruby (typically generated by Marshal.dump), but no fast way

# Correct but too slow way:
uint8array = JS.global[:Uint8Array].new(arraybuffer)
Marshal.load(uint8array.to_a.map(&:to_i).pack("C*")) # Especially the slow JS::Object#to_i on each byte.

首先跟踪 JS.global.fetch 和 response.arrayBuffer 所使用的 Ruby WebAssembly JavaScript 互操作机制，然后将其与 issue 中展示的 Uint8Array 转换进行比较。完成的标准是：response.arrayBuffer 中的 ArrayBuffer 数据可以传递给 Marshal.load，而无需通过 JavaScript 对象转换每个字节。