gltf and redis

I tried to put my .gltf 3d model in redis, because I thought if I get it from redis ,it should be faster than disk . But the result told me I was wrong. I just tested one 3.3M .gltf, while the redis time was 2 times slower than disk, please tell me why. The problem troubled me two days. PLEASE HELP ME !!! THANK YOU VERY MUCH!!!