55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict
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* @format
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* @oncall react_native
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*/
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// flowlint unsafe-getters-setters:off
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export type MemoryInfoLike = {
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jsHeapSizeLimit: ?number,
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totalJSHeapSize: ?number,
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usedJSHeapSize: ?number,
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};
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// Read-only object with JS memory information. This is returned by the performance.memory API.
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export default class MemoryInfo {
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_jsHeapSizeLimit: ?number;
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_totalJSHeapSize: ?number;
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_usedJSHeapSize: ?number;
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constructor(memoryInfo: ?MemoryInfoLike) {
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if (memoryInfo != null) {
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this._jsHeapSizeLimit = memoryInfo.jsHeapSizeLimit;
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this._totalJSHeapSize = memoryInfo.totalJSHeapSize;
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this._usedJSHeapSize = memoryInfo.usedJSHeapSize;
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}
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}
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/**
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* The maximum size of the heap, in bytes, that is available to the context
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*/
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get jsHeapSizeLimit(): ?number {
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return this._jsHeapSizeLimit;
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}
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/**
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* The total allocated heap size, in bytes
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*/
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get totalJSHeapSize(): ?number {
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return this._totalJSHeapSize;
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}
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/**
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* The currently active segment of JS heap, in bytes.
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*/
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get usedJSHeapSize(): ?number {
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return this._usedJSHeapSize;
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}
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}
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