PSA: Cardano (ADA) runs at SEVEN (7) transactions per second. Full sources and calculations in comments.

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PSA: Cardano (ADA) runs at SEVEN (7) transactions per second. Full sources and calculations in comments.

There are 3 things that determine transaction speed: block size, block time and transaction size. Let's look at all 3 for Cardano.

  1. Block size. The maximum size of a block is 65536bytes.

Here is the source: https://forum.cardano.org/t/cip-initial-updatable-parameter-values/42261/3

If you scroll down you see the variable "maxBlockBodySize 65536" and it is helpfully explained "Maximum size of a block body. Limits blockchain storage size, and communication costs."

  1. Block time. This is 20 seconds on average. Can't find a great source for this as the block time jumps around a lot on the explorers but Google give you loads of sources e.g. https://uk.advfn.com/crypto/Cardano-ADA/fundamentals

  2. Transaction size. It varies but it is around 500 bytes often more. Go here https://explorer.cardano.org/en.html and look at the number of transaction in a block and its size, divide.

So to calculate tps we do: 65536 / 20 / 500 = 6.55tps.

The Cardano sub is aware of the issue see here: https://np.reddit.com/r/cardano/comments/lh21a5/someone_help_me_figure_this_out_max_tps_under/ where this issue was discussed quite technically.

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