perf: reduce memory overhead per entry - #52
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- remove size field from Entry (compute on demand): -8 bytes - use u64 timestamp instead of Option<Instant> for expiry: -8 bytes - use Box<str> instead of String for keys in concurrent mode: -8 bytes - add time.rs module for compact monotonic timestamps total savings: ~24 bytes per entry in concurrent mode
- throughput: 1.86M SET/sec, 2.48M GET/sec (1.85-2.14x vs redis) - memory: 257 bytes/key (down from 307, 16% reduction) - non-pipelined: 2x faster than redis (200k vs 100k ops/sec)
kacy
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Feb 11, 2026
* perf: reduce memory overhead per entry - remove size field from Entry (compute on demand): -8 bytes - use u64 timestamp instead of Option<Instant> for expiry: -8 bytes - use Box<str> instead of String for keys in concurrent mode: -8 bytes - add time.rs module for compact monotonic timestamps total savings: ~24 bytes per entry in concurrent mode * docs: update benchmarks with memory optimization results - throughput: 1.86M SET/sec, 2.48M GET/sec (1.85-2.14x vs redis) - memory: 257 bytes/key (down from 307, 16% reduction) - non-pipelined: 2x faster than redis (200k vs 100k ops/sec) * style: fix formatting
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summary
reduces memory overhead per entry by ~20% through:
Option<Instant>(16 bytes) withu64timestamps (8 bytes)size: usizefield from Entry (computed on demand)Box<str>instead ofStringfor keys in concurrent mode (24→16 bytes)introduces a shared
timemodule for compact monotonic timestamps.benchmark results
memory test (1M keys, 64-byte values):
throughput test (no regression):
tested
cargo clippyclean