The fastest way to send multiples transactions

Question

I want to send multiple transactions from differents address at the same time with Infura and Web3.py

Currently my code look like this :

for i in range (n):
   tx= ... (build transaction for adresse i)
   signed_tx = w3.eth.account.sign_transaction(tx, key[i])
   w3.eth.sendRawTransaction(signed_tx.rawTransaction)

Is this the best way to do it ? Because it only send 3 tx each secondes.

Can it be caused by slow internet connexion or slow computer ? How to speed it ?

EDIT : I did some tests and build each transaction need 0.15s, send it 0.30s more, only 0.001s to sign

EDIT2 : I tried with faster internet and computer, it doesn't change anything

Thank you

Answer 1

The miners needs to mine the transactions. Its need time.

In addiction, Ethereum is collapsed. You can see more than 100K pending transactions in Ether Scan

Answer 2

My guesses are that it's either:

1. A limit of tx per address set by Infura, or
2. A limit of tx per API user set by Infura, or
3. A limit of tx per address set by miners (there is an option in Geth to set the max number of tx per address).