add another implementation, unfortunately unnamed
add another implementation, unfortunately unnamed

SuperSodaSea/itoa-benchmark,miloyip/itoa-benchmark,miloyip/itoa-benchmark,miloyip/itoa-benchmark,SuperSodaSea/itoa-benchmark,miloyip/itoa-benchmark,SuperSodaSea/itoa-benchmark,SuperSodaSea/itoa-benchmark,miloyip/itoa-benchmark,SuperSodaSea/itoa-benchmark