How to reduce the 3D texture copy time? eglimage only for 2d?

OpenGL OpenGL: Advanced Coding
1

I use 3D textures to realize 3D LUT (3d trilinear interpolation) on image using opengles3.x on android phone. Draw takes a very short time,but 3D texture(64x64x8) copy from cpu to gpu take long time, so how to reduce the 3D texture copy time?
use eglimage can save 2D texture copy time. Does it still work with 3D texture and how to use ?

thanks

2

look forward to a reply.look forward to a reply.look forward to a reply.