How does the computational cost of verifying transactions scale with the number of total transactions?

How does the computational cost of verifying transactions scale with the number of total transactions?

As more transactions are added to the block chain, does each individual transaction (ie. I send a bitcoin to a friend) get more expensive (in terms of FLOPS) to verify and commit to the chain? If each new transaction cost does change the difficulty of verifying subsequent transactions, how does this scale?

I'd appreciate any answers, links or even location in the code where this happens. Thanks.

Reference: bitcoin wiki on confirmations

http://ift.tt/2BHAB6g

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