Function bigRelErr

test/compute-engine/distributions.test.ts:192–201

(got: BigDecimal, wantStr: string)

    // itself lose the digits we are trying to measure.
    function bigRelErr(got: BigDecimal, wantStr: string): number {
      const saved = BigDecimal.precision;
      BigDecimal.precision = saved + 30;
      try {
        const want = B(wantStr);
        return got.sub(want).abs().div(want.abs()).toNumber();
      } finally {
        BigDecimal.precision = saved;
      }
    }

    describe('50-digit precision', () => {
      beforeEach(() => {
        BigDecimal.precision = 50;