Run results for: Remove items from array vs from objects

Test name	Executions per second
✓ Remove object key (first)	21,080,100 Ops/sec
Remove object key (last)	20,245,240 Ops/sec
Splice (first item)	7,137,730 Ops/sec
Filter (first item)	6,755,804 Ops/sec
Filter (last item)	5,773,236 Ops/sec
Splice (last item)	5,756,174 Ops/sec

Splice (first item)

const a = [{id: "a"}, {id: "b"}, {id: "c"}, {id: "d"}, {id: "e"}, {id: "f"},{id: "g"},{id: "h"},{id: "i"},{id: "j"},{id: "k"},{id: "l"}];
const indexToRemove = a.findIndex(i => i === "a");
const b = a.splice(indexToRemove, 1);

Splice (last item)

const a = [{id: "a"}, {id: "b"}, {id: "c"}, {id: "d"}, {id: "e"}, {id: "f"},{id: "g"},{id: "h"},{id: "i"},{id: "j"},{id: "k"},{id: "l"}];
const indexToRemove = a.findIndex(i => i === "l");
const b = a.splice(indexToRemove, 1);

Filter (first item)

const a = [{id: "a"}, {id: "b"}, {id: "c"}, {id: "d"}, {id: "e"}, {id: "f"},{id: "g"},{id: "h"},{id: "i"},{id: "j"},{id: "k"},{id: "l"}];
const b = a.filter(item => item.id !== "a")

Filter (last item)

const a = [{id: "a"}, {id: "b"}, {id: "c"}, {id: "d"}, {id: "e"}, {id: "f"},{id: "g"},{id: "h"},{id: "i"},{id: "j"},{id: "k"},{id: "l"}];
const b = a.filter(item => item.id !== "l")

Remove object key (first)

const a = {
a: {key: true},
b: {key: true},
c: {key: true},
d: {key: true},
e: {key: true},
f: {key: true},
g: {key: true},
h: {key: true},
i: {key: true},
j: {key: true},
k: {key: true},
l: {key: true}
}
a.a = undefined

Remove object key (last)

const a = {
a: {key: true},
b: {key: true},
c: {key: true},
d: {key: true},
e: {key: true},
f: {key: true},
g: {key: true},
h: {key: true},
i: {key: true},
j: {key: true},
k: {key: true},
l: {key: true}
}
a.l = undefined