Array.shift is very slow about boa

[jedel1043]

#3407

[ahaoboy]

@jedel1043 How about Array.unshift, unshift and shift functions are quite similar, and both are very slow. Can similar methods be used for optimization?

Array.splice is also a commonly used method for modifying arrays, and it's slow in Boa as well.

let a = [];
let n = 10000;
while(n--) a.splice(0,0,n)
console.log(a)

[jedel1043]

@jedel1043 How about Array.unshift, unshift and shift functions are quite similar, and both are very slow. Can similar methods be used for optimization?

Array.splice is also a commonly used method for modifying arrays, and it's slow in Boa as well.

let a = [];
let n = 10000;
while(n--) a.splice(0,0,n)
console.log(a)

Yeah, arrays in general need a lot of extra work. I'll open a tracking issue for that.