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Improve array decoding performance #32

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Merged
merged 1 commit into from
May 28, 2019
Merged

Improve array decoding performance #32

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9 changes: 6 additions & 3 deletions src/Decoder.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ type StackArrayState = {
type: State.ARRAY;
size: number;
array: Array<unknown>;
position: number;
};

type StackState = StackArrayState | StackMapState;
Expand Down Expand Up @@ -318,8 +319,9 @@ export class Decoder {
// arrays and maps
const state = stack[stack.length - 1];
if (state.type === State.ARRAY) {
state.array.push(object);
if (state.array.length === state.size) {
state.array[state.position] = object;
state.position++;
if (state.position === state.size) {
stack.pop();
object = state.array;
} else {
Expand Down Expand Up @@ -387,7 +389,8 @@ export class Decoder {
this.stack.push({
type: State.ARRAY,
size,
array: [],
array: new Array<unknown>(size),
position: 0,
});
}

Expand Down