diff --git a/binding/rust/ReadMe.md b/binding/rust/ReadMe.md index b3a1bc8..8667b54 100644 --- a/binding/rust/ReadMe.md +++ b/binding/rust/ReadMe.md @@ -5,13 +5,17 @@ - 支持 IPv4 和 IPv6 - 支持无缓存，Vector 索引缓存，全部数据缓存三种模式 -## 缓存策略对比 +## 缓存策略对比与说明 | 缓存模式 | IPv4 数据内存占用 | IPv6 数据内存占用 | IPv4 benchmark 查询耗时 | IPv6 benchmark 查询耗时 | -| ------------ | ----------- | ----------- | ------------------- | ------------------- | -| 无缓存 | 1-2MB | 1-2MB | 54 us | 47us | -| vector index | 1-2MB | 1-2MB | 27 us | 19us | -| 全部缓存 | 20 MB | 200 MB | 120 ns | 638 ns | +| ------------ | ----------- | ----------- | ------------------- |---------------------| +| 无缓存 | 1-2MB | 1-2MB | 54 us | 122us | +| vector index | 1-2MB | 1-2MB | 27 us | 100us | +| 全部缓存 | 20 MB | 200 MB | 120 ns | 178 ns | +- 在 `ip2region::Searcher` 初始化的时候会产生一次 IO, 读取 `xdb` 的 header 信息以初始化 `Searcher`，header 信息主要包含了 `xdb` 的 IP 版本，该操作对后续 IP 的查询不产生性能，耗时影响，多占用约 20 Byte 的内存 +- 在无缓存模式与 `vector index` 缓存模式下，所有 `xdb` 的 IO 读取都是按需（按照 bytes offset, bytes length）读取少量信息, 都是线程安全的，可以 benchmark 测试验证 +- 在全部缓存模式下，`xdb` 文件会一次读取，加载到内存中，测试 `IPv6 xdb` 文件大约占用内存 200MB 左右，查询不频繁的话，占用内存会逐渐降低 +- 所有缓存模式下，包括初始化 `ip2region::Searcher` 过程当中，程序都是线程安全的，不存在某个全局可修改的中间变量，`ip2region::Searcher` 初始化完成以后，调用函数`search`都是使用不可变引用，同时 `ip2region::Searcher` 也可以通过 `Arc` 方式传递给不同线程使用 ## 使用方式 @@ -71,39 +75,39 @@ $ cargo test $ cargo bench // --snip--- -ipv4_no_memory_bench time: [53.020 µs 54.810 µs 57.837 µs] -Found 14 outliers among 100 measurements (14.00%) - 1 (1.00%) low mild - 3 (3.00%) high mild - 10 (10.00%) high severe +ipv4_no_memory_bench time: [54.699 µs 57.401 µs 61.062 µs] +Found 16 outliers among 100 measurements (16.00%) + 10 (10.00%) high mild + 6 (6.00%) high severe ipv4_vector_index_cache_bench - time: [26.411 µs 27.070 µs 28.078 µs] -Found 8 outliers among 100 measurements (8.00%) - 1 (1.00%) low mild - 2 (2.00%) high mild - 5 (5.00%) high severe + time: [25.972 µs 26.151 µs 26.360 µs] +Found 9 outliers among 100 measurements (9.00%) + 1 (1.00%) low severe + 6 (6.00%) high mild + 2 (2.00%) high severe ipv4_full_memory_cache_bench - time: [124.26 ns 126.01 ns 128.21 ns] -Found 8 outliers among 100 measurements (8.00%) - 5 (5.00%) high mild + time: [132.04 ns 139.48 ns 149.20 ns] +Found 10 outliers among 100 measurements (10.00%) + 4 (4.00%) high mild + 6 (6.00%) high severe + +ipv6_no_memory_bench time: [121.00 µs 122.14 µs 123.40 µs] +Found 5 outliers among 100 measurements (5.00%) + 2 (2.00%) high mild 3 (3.00%) high severe -ipv6_no_memory_bench time: [46.541 µs 47.365 µs 48.518 µs] -Found 9 outliers among 100 measurements (9.00%) - 4 (4.00%) high mild - 5 (5.00%) high severe - ipv6_vector_index_cache_bench - time: [19.596 µs 19.777 µs 19.967 µs] -Found 3 outliers among 100 measurements (3.00%) - 3 (3.00%) high mild + time: [96.830 µs 100.23 µs 104.81 µs] +Found 8 outliers among 100 measurements (8.00%) + 2 (2.00%) high mild + 6 (6.00%) high severe ipv6_full_memory_cache_bench - time: [603.73 ns 638.19 ns 683.22 ns] -Found 12 outliers among 100 measurements (12.00%) - 4 (4.00%) high mild - 8 (8.00%) high severe + time: [175.29 ns 178.82 ns 183.77 ns] +Found 6 outliers among 100 measurements (6.00%) + 2 (2.00%) high mild + 4 (4.00%) high severe // --snip-- ```