Libdefs for Node’s experimental (as of v10.7.x) core module, perf_hooks

perf_hooks.js

// @flow

/**
 * Libdefs for Node’s experimental (as of v10.7.x) core module, perf_hooks.
 *
 * TODO Work in progress. Add libdefs for other functions in this module.
 *
 * @see https://nodejs.org/api/perf_hooks.html
 */
declare module 'perf_hooks' {
    declare export var performance: {
        /**
         * @see https://nodejs.org/api/perf_hooks.html#perf_hooks_performance_mark_name
         */
        mark: (string) => void,

        /**
         * @see https://nodejs.org/api/perf_hooks.html#perf_hooks_performance_measure_name_startmark_endmark
         */
        measure: (string, string, string) => void,

        /**
         * @see https://nodejs.org/api/perf_hooks.html#perf_hooks_performanceobserverentrylist_getentriesbyname_name_type
         */
        getEntriesByName: (string, ?string) => Array<{
            duration: number,
        }>,
    }
}