After some deep research and a lot of testing finally found out that the problem wasnt the loop as because it works on a simple maths. but the problem was in the rendering batch, the more batch there is, java will likely to share more memory to each batch as because batch is a collection of vertices. i divided them because i have to batch.begin() and batch.end() every batch, and it runs better. thanks all in helping me today. P.s sorry for bas english XD

After some deep research and a lot of testing finally found out that the problem wasnt the loop as because it works on a simple maths. but the problem was in the rendering batch, the more batch there is, java will likely to share more memory to each batch as because batch is a collection of vertices. i divided them because i have to batch.begin() and batch.end() every batch, and it runs better. thanks all in helping me today. P.s sorry for bad english XD