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mempool: mem usage estimation.

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This commit is contained in:
Christopher Jeffrey 2016-08-21 11:04:47 -07:00
parent 9c8d4d185f
commit d17ba07475
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GPG Key ID: 8962AB9DE6666BBD
1 changed files with 22 additions and 11 deletions
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lib/bcoin/mempool.js
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@ -1493,7 +1493,7 @@ Mempool.prototype._removeSpenders = function _removeSpenders(entry) {
Mempool.prototype.memUsage = function memUsage(tx) { Mempool.prototype.memUsage = function memUsage(tx) {
var mem = 0; var mem = 0;
var i, input, output; var i, j, input, output, coin, op;
mem += 264; // tx mem += 264; // tx
mem += 80; // _hash mem += 80; // _hash
@ -1507,13 +1507,19 @@ Mempool.prototype.memUsage = function memUsage(tx) {
mem += 144; // input mem += 144; // input
if (input.coin) { if (input.coin) {
coin = input.coin;
mem += 144; // coin mem += 144; // coin
mem += 88; // coin hash mem += 88; // coin hash
mem += 40; // script mem += 40; // script
mem += 80; // script raw buffer mem += 80; // script raw buffer
mem += 32; // script code array mem += 32; // script code array
mem += input.coin.script.code.length * 40; // opcodes mem += coin.script.code.length * 40; // opcodes
mem += 80; // add a code buffer (assume p2pkh)
for (j = 0; j < coin.script.code.length; j++) {
op = coin.script.code[j];
if (op.data)
mem += 80; // op buffers
}
} }
mem += 104; // prevout mem += 104; // prevout
@ -1523,7 +1529,12 @@ Mempool.prototype.memUsage = function memUsage(tx) {
mem += 80; // script raw buffer mem += 80; // script raw buffer
mem += 32; // script code array mem += 32; // script code array
mem += input.script.code.length * 40; // opcodes mem += input.script.code.length * 40; // opcodes
mem += 160; // add two code buffers (assume p2pkh)
for (j = 0; j < input.script.code.length; j++) {
op = input.script.code[j];
if (op.data)
mem += 80; // op buffers
}
mem += 96; // witness mem += 96; // witness
mem += 32; // witness items mem += 32; // witness items
@ -1534,22 +1545,22 @@ Mempool.prototype.memUsage = function memUsage(tx) {
for (i = 0; i < tx.outputs.length; i++) { for (i = 0; i < tx.outputs.length; i++) {
output = tx.outputs[i]; output = tx.outputs[i];
mem += 120; // output mem += 120; // output
mem += 40; // script mem += 40; // script
mem += 80; // script raw buffer mem += 80; // script raw buffer
mem += 32; // script code array mem += 32; // script code array
mem += output.script.code.length * 40; // opcodes mem += output.script.code.length * 40; // opcodes
mem += 80; // add a code buffer (assume p2pkh)
for (j = 0; j < output.script.code.length; j++) {
op = output.script.code[j];
if (op.data)
mem += 80; // op buffers
}
} }
mem += 176; // mempool entry mem += 176; // mempool entry
// Note: normally we could add 176 (88 * 2)
// bytes for the spent and tx hash table
// entries, but v8 seems to store these
// strings off the heap, so it shouldn't
// be too much of a problem.
return mem; return mem;
}; };