Sequence of pistons and blocks of redstone generates decrease of fps when deactivating them

When placing the pistons and redstone blocks in the manner shown in the screenshot, activating "piston 1" will activate "piston 2", then from 2 to 3, 3 to 4 ... more when the first piston is deactivated, all the pistons are deactivated simultaneously, causing a slight decrease in fps for a few moments.