@BiranLi i'm using this test code:
```
import mxnet as mx
import time
a = mx.nd.ones((512, 8192), ctx=mx.gpu())
for i in range(10):
b = a.slice(begin=(None, 4), end=(None, None))
mx.nd.waitall()
t0 = time.time()
for i in range(1000):
b = a.slice(begin=(None, 4), end=(None, None))
mx.nd.waitall()
t1 = time.time()
print(t1 - t0)
```
What did you use? Are you on slack?
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https://github.com/apache/incubator-mxnet/pull/11124 ]
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