Faster Production is an upgrade for the Spike Factory. In BTD4, it debuted as Increased Production. In later games, it was renamed as Faster Production. Across all games it has appeared in, it allows the Spike Factory to produce spike piles 50% faster.
Bloons Tower Defense 4
Faster Production will increase the spike production rate by 50%. Upon purchasing the upgrade, a private's symbol is shown beside the Spike Factory to indicate that it's a Level 2 Spike Factory.
Bloons Tower Defense 5
Faster Production is the 1st upgrade of Path 2 for the Tower in BTD5. It allows the Spike Factory to produce spike piles 50% faster. It costs $680 on Easy, $800 on Medium, $865 on Hard, and $960 on Impoppable.
Faster Production will allow spike piles to be produced 50% faster.
Initially, when upgraded to just Faster Production, the feet of the Spike Factory will turn blue. When combined with Bigger Stacks, the feet of the Spike Factory will turn purple. No other visual changes occur.
Bloons TD 6
For more information, see Faster Production (BTD6).