message: Remove unroll_factor for MLIR generated cast kernels.
  It turns out the conversion from f32 to i64 is ~30% faster without unroll_factor.
diff: @@ -1088,8 +1088,8 @@ gpu_kernel_library(
  "f64",
  ] * 8,
  tile_size = "256",
  - types = ["i1"] * 8 + ["i8"] * 8 + ["i16"] * 8 + ["i32"] * 8 + ["i64"] * 8 + ["f16"] * 8 + ["f32"] * 8 + ["f64"] * 8,
  - unroll_factors = "4",
  + types = ["i1"] * 8 + ["i8"] * 8 + ["i16"] * 8 + ["i32"] * 8 + ["i64"] * 8 +
  + ["f16"] * 8 + ["f32"] * 8 + ["f64"] * 8,
  )
  gpu_kernel_library(
  