Quote from: xblitz on November 30, 2012, 03:24:23 AM

Quote from: jgarzik on November 29, 2012, 10:11:50 PM

Quote from: grau on November 29, 2012, 09:42:14 PM

Introducing an opportunistic cache of the last 100.000 transactions gave such a boost to the server that I thought it is worth writing about.
Apparently outputs die generally rather young and saving the db roundtrip for them is the single biggest boost I found until now...

Yep, pynode figured many of these things out, long ago. A block (including TXs) cache is very useful.

For long running nodes, the signature cache is also very helpful. Over time, transactions are accepted into the memory pool and signature cache. When a new block arrives, the majority of transactions found in that block will have had their signatures pre-checked and cached, making acceptance of that block go more rapidly.

are you honestly adding more info.. or just trying to point out that your "pynode" is *so* ahead ??

pynode is quite incomplete, as the TODO notes. bitsofproof is farther along in many ways.

The point is that these are well known techniques, and it is disappointing that these are being "discovered" when the knowledge is readily available for anyone who looks.