Identity/AttachedServices/Key Stretching Performance Tests
< Identity | AttachedServices
| Browser / Test | Firefox 23 Desktop | Google Chrome 28 | Firefox Android Beta 24 | Firefox OS | Android WebView | Android + OpenSSL |
|---|---|---|---|---|---|---|
| [1] 20k PBKDF2-SHA256 | 5.39 ops/sec ±4.20% (30 runs sampled) | 8.12 ops/sec ±1.15% (43 runs sampled) | 0.47 ops/sec ±7.73% (7 runs sampled) | 0.24 ops/sec ±7.06% (6 runs sampled) | 0.66 ops/sec ±4.35% (8 runs sampled) | 2.85 ops/sec (**1 run sampled**) |
| [2] 20k*PBKDF + remote(scrypt(64k,8,1)) + 20k*PBKDF | 0.66 ops/sec ±10.70% (8 runs sampled) | 0.79 ops/sec ±1.98% (8 runs sampled) | 0.16 ops/sec ±9.02% (5 runs sampled) | 0.10 ops/sec ±3.37% (5 runs sampled) | 0.18 ops/sec ±21.96% (6 runs sampled) | -- |
| [3] 20kPBKDF + local(scrypt(64k,8,1)) + 20kPBKDF | -- | -- | -- | -- | -- | 0.1369 ops/sec (10 runs sampled, extremes discarded -- 7362-7505msec) |
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
- [3] 20kPBKDF + local(scrypt(64k,8,1)) + 20kPBKDF
Note that the 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 .
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.
Test Suite Page: http://v14d.com/picl/benchmark.html