tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






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denji

Moved to git-repository: https://github.com/denji/awesome-http-benchmark

Tools

Located in alphabetical order (not prefer)

• ab – slow and single threaded, written in C
• apib – most of the features of ApacheBench (ab), also designed as a more modern replacement, written in C
• autocannon – fast HTTP/1.1 benchmarking tool written in Node.js
• baloo – Expressive end-to-end HTTP API testing made easy, written in Go (golang)

debasishg

General Background and Overview

1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
2. Models and Issues in Data Stream Systems
3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t

cowboy

var parent = function() {
  var spawn = require('child_process').spawn;
  var child = spawn(process.execPath, [process.argv[1], 123]);
  var stdout = '';
  var stderr = '';
  child.stdout.on('data', function(buf) {
    console.log('[STR] stdout "%s"', String(buf));
    stdout += buf;
  });
  child.stderr.on('data', function(buf) {

jboner

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

rednaxelafx

  1   b   java.lang.String::charAt (33 bytes)
  2   b   java.lang.Math::max (11 bytes)
  3   b   java.util.jar.Manifest$FastInputStream::readLine (167 bytes)
  4   b   sun.nio.cs.UTF_8$Decoder::decodeArrayLoop (553 bytes)
  5   b   java.util.Properties$LineReader::readLine (383 bytes)
  6   b   java.lang.String::hashCode (60 bytes)
  7   b   java.lang.String::indexOf (151 bytes)
  8   b   sun.nio.cs.ext.DoubleByteDecoder::decodeSingle (10 bytes)
  9   b   java.lang.String::lastIndexOf (156 bytes)
 10   b   java.lang.String::replace (142 bytes)