We report on the performance evaluation of the LEMAC miniature atomic clock, based on the optical-microwave Double-Resonance (DR) scheme, implementing a micro-fabricated Rb vapor cell held inside a custom-designed micro-loop-gap microwave resonator (μ-LGR) and a low-power laser source. The clock stability is 1.10-11 τ-1/2(τ=1 to 100 s) and 4.10-12 at one day, with low drift of 2.10-13/day.