| commit | 42c2c729597eb7e8a87c62dce435781f47732d2c | [log] [tgz] |
|---|---|---|
| author | tomlu <tomlu@google.com> | Wed Jan 31 11:18:20 2018 -0800 |
| committer | Copybara-Service <copybara-piper@google.com> | Wed Jan 31 11:20:14 2018 -0800 |
| tree | c524951169166f05b61e470a47eafab73dfc0240 | |
| parent | 223ed93582dbb730eb92c80cc6350dcec116ec0a [diff] |
Add memory-efficient map for storing nested set -> digest. Instead of using ConcurrentHashMap, we use a dead-simple open addressed hash hable with a giant byte array with 16-byte slots. We then read or write fingerprints straight into and out of the array, obviating the need to generate intermediate garbage. Locking mechanism is a read-write lock. This should be faster than full synchronisation for read-heavy loads. RELNOTES: None PiperOrigin-RevId: 184019301
{Fast, Correct} - Choose two
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