tf.keras.activations.hard_silu

Hard SiLU activation function, also known as Hard Swish.

tf.keras.activations.hard_silu(
    x
)

It is defined as:

• 0 if if x < -3
• x if x > 3
• x * (x + 3) / 6 if -3 <= x <= 3

It's a faster, piecewise linear approximation of the silu activation.

Reference:

• A Howard, 2019