react-performance-testing/dist/types/perf.d.ts

You can test React(ReactNative) runtime performance by using this lib. If you want to check the number of renders, or render time in a test environment, this lib makes sense.

export interface RenderCountField {
    value: number;
}
export interface RenderTimeField {
    mount: number;
    updates: number[];
}
export declare type DefaultPerfToolsField = Record<string, any>;
export declare type PerfToolsMutation<T, U> = {
    [K in keyof T]: T[K] extends unknown[] ? U[] : U extends unknown ? U : U | U[] | undefined;
};
export interface PerfTools<T = DefaultPerfToolsField> {
    renderCount: {
        current: PerfToolsMutation<T, RenderCountField>;
    };
    renderTime: {
        current: PerfToolsMutation<T, RenderTimeField>;
    };
}
export interface PerfState {
    hasRenderCount: boolean;
    hasRenderTime: boolean;
    renderCount?: boolean;
    renderTime?: boolean;
}
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