Identity/AttachedServices/Key Stretching Performance Tests

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Last updated: 2013/11/22
Test Results (in seconds per operation)
Browser / Test Firefox 23 Desktop (MBP) Google Chrome 28 (MBP) Firefox Android Beta 24 (Nexus4) Firefox OS (Keon) Android WebView (Nexus4) Android + OpenSSL
[1] 20k PBKDF2-SHA256 186ms (5.39 ops/sec ±4.20%, 30 runs sampled) 123ms (8.12 ops/sec ±1.15%, 43 runs sampled) 2.13s (0.47 ops/sec ±7.73%, 7 runs sampled) 4.17s (0.24 ops/sec ±7.06%, 6 runs sampled) 1.52s (0.66 ops/sec ±4.35%, 8 runs sampled) 351ms (2.85 ops/sec, **1 run sampled**)
[2] 20k*PBKDF + remote(scrypt(64k,8,1)) + 20k*PBKDF 1.52s (0.66 ops/sec ±10.70%, 8 runs sampled) 1.27s (0.79 ops/sec ±1.98%, 8 runs sampled) 6.25s (0.16 ops/sec ±9.02%, 5 runs sampled) N/A 5.56s (0.18 ops/sec ±21.96%, 6 runs sampled) --
[2.1] running on m1.large 1.05s (0.94 ops/sec ±7.06% (9 runs sampled)) 846ms (1.18 ops/sec ±0.55% (10 runs sampled)) 5.25s (0.19 opts/sec ±8.91% (5 runs sampled) 11.79s (0.08 opts/sec ±1.98% (5 runs sampled) 3.94s (0.25 opts/sec ±5.78% (6 runs sampled) --
[3] 20kPBKDF + local(scrypt(64k,8,1)) + 20kPBKDF -- -- -- -- -- 7.3s (0.1369 ops/sec, 10 runs sampled, extremes discarded -- 7362-7505msec)
[4] 20kPBKDF + emscripten(scrypt(64k,8,1)) + 20kPBKDF 3.6s (0.28 ops/sec ±26.77%, 6 runs sampled) 3.2s (0.31 ops/sec ±1.46%, 6 runs sampled) 20s (0.05 ops/sec ±25.20%, 5 runs sampled) Crash. 33s (0.03 ops/sec ±2.86%, 5 runs sampled) --


Tests

  • [1] 20k PBKDF2-SHA256, pdbkdf2.derive(...) - Client pdbkdf2 derivation #stretch-KDF
  • [2] 20k*PBKDF+scrypt(64k,8,1)+20k*PBKDF keyStretch.derive(email, password) - Full Key Stretch with a remote scrypt helper at "http://scrypt.dev.lcip.org/" (EC2 m1.small, est scrypt(64k,8,1) time = 2.2s). #stretch-KDF + #main-KDF. m1.small instance runs scrypt in 2.2s, whereas the more cost-effective (given serious load) c1.medium or c1.xlarge instances will run it in 1.0s .
  • [2.1] running on m1.large remote instance
  • [3] 20kPBKDF + local(scrypt(64k,8,1)) + 20kPBKDF
  • [4] 20kPBKDF + emscripten(scrypt(64k,8,1)) + 20kPBKDF Using the Pure-Javascript Emscripten-compiled scrypt routine. Modified 'TOTAL_MEMORY' to 'scrypt_module_factory(134217728);'


Test Framework

These performance tests use Benchmark.js

  • "ops/sec" stands for operations per second. That is how many times a test is projected to execute in a second.
  • A test is repeatedly executed until it reaches the minimum time needed to get a percentage uncertainty for the measurement of less than or equal to 1%. The number of iterations will vary depending on the resolution of the environment’s timer and how many times a test can execute in the minimum run time. We collect completed test runs for 5 seconds (configurable), or at least 5 runs (also configurable), and then perform statistical analysis on the sample. So, a test may be repeated 100,000 times in 50 ms (the minimum run time for most environments), and then repeated 100 times more (5 seconds). A larger sample size (in this example, 100), leads to a smaller margin of error.
  • benchmark.js returns ops/sec, rounded to hundredths. This number was inverted to obtain secs/op, losing precision in the process.

Hardware Used

  • Firefox Desktop, Google Chrome - MacBook Pro 2.7 GHz i7, 16 GB 1600MHz DDR3
  • Firefox OS - Keon (Snapdragon S1 7225AB 1Ghz, 512 RAM)
  • Firefox Android, Android Webview - Nexus 4 (1.512 GHz quad-core, 2GB RAM)

Test Suite Page: http://vladikoff.github.io/fxa-js-client-old/web/benchmark.html