Run
./trace-ic.sh http://localhost:8080 > ic.log
Wait until your page renders and the log file appending settles down.
List<FoundMatch> findMatches(List<List<String>> lines, String wordToFind) { | |
final foundMatches = <FoundMatch>[]; | |
for (var lineIndex = 0; lineIndex < lines.length; lineIndex++) { | |
final row = lines[lineIndex]; | |
for (var columnIndex = 0; columnIndex < row.length; columnIndex++) { | |
final currentCharacter = lines[lineIndex][columnIndex]; | |
if (currentCharacter != wordToFind[0]) { |
const bench = require('fastbench') | |
function valuesFn (array) { | |
var i = 0 | |
return function (abort, cb) { | |
if(i >= array.length) | |
cb(true) | |
else | |
cb(null, array[i++]) | |
} |
var fs = require('fs') | |
for (var i = 0; i < 10000; i++) { | |
printLength(__filename) | |
} | |
function printLength (filename) { | |
fs.readFile(filename, foo) | |
function foo (err, buf) { |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |