export declare enum ConcurrencyOption {
    /**
     * One thread per four cores.
     */
    Quarter = "Quarter",
    /**
     * One thread per two cores.
     */
    Half = "Half",
    /**
     * Default concurrency. Two threads per core (`x2`).
     */
    Default = "x2",
    /**
     * One thread per core.
     */
    x1 = "x1",
    /**
     * Two threads per core.
     */
    x2 = "x2",
    /**
     * Four threads per core.
     */
    x4 = "x4",
    /**
     * Six threads per core.
     */
    x6 = "x6",
    /**
     * Eight threads per core.
     */
    x8 = "x8",
    /**
     * Ten threads per core.
     */
    x10 = "x10"
}
/**
 * Set values to be used when multiplying the number of
 * CPUs on the machine to generate a pool concurrency value.
 */
export declare const concurrencyOptionMultipliers: {
    readonly Quarter: 0.25;
    readonly Half: 0.5;
    readonly x1: 1;
    readonly x2: 2;
    readonly x4: 4;
    readonly x6: 6;
    readonly x8: 8;
    readonly x10: 10;
};