If a node has 100 connections to other nodes and receives a new transaction using a getData request, it sends an inv message to it's 100 connecting peers correct?
Does it also send the inv message to the peer that it just received the transaction from as it is still one of it's connecting peers?
'Messages, in general, are flushed periodically about every 100 ms. However, transaction relaying takes place by “trickling” messages out. Bitcoin randomly selects with a probability of 1/4 the transactions for an inv message and stalls the remaining transactions. Every neighbor gets a different set of randomly chosen transactions, each about 1/4 of the currently available set. Only the randomly selected “trickling node” (cf. addr message relaying) gets all transactions immediately. The other neighbors either get it later or already got it from another neighbor. Trickling reduces the overhead and at the same time makes traffic analysis more difficult, in a similar manner as mixes do in mix networks.'
I'm having a bit of difficulty understanding how trickling works in terms of transactions. I believed that the process was when a transaction occurs, the node responsible for the transaction would send INV messages to its peers and send the tx if the peers respond with getData.