refactor: replace rand crate with fastrand

Replaces the `rand` crate with `fastrand` for improved performance in rate control and reflector selection.
2026-02-22 00:33:57 +07:00
1 parent 616a3b1c70
commit 830e21363a
@@ -97,17 +97,6 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"

-[[package]]
-name = "chacha20"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f8d983286843e49675a4b7a2d174efe136dc93a18d69130dd18198a6c167601"
-dependencies = [
- "cfg-if",
- "cpufeatures",
- "rand_core",
-]
-
 [[package]]
 name = "clang-sys"
 version = "1.8.1"
@@ -143,15 +132,6 @@ dependencies = [
 "cc",
 ]

-[[package]]
-name = "cpufeatures"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "deranged"
 version = "0.5.7"
@@ -174,12 +154,6 @@ dependencies = [
 "termcolor",
 ]

-[[package]]
-name = "equivalent"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
-
 [[package]]
 name = "errno"
 version = "0.3.14"
@@ -190,59 +164,24 @@ dependencies = [
 "windows-sys 0.61.2",
 ]

+[[package]]
+name = "fastrand"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"

-[[package]]
-name = "foldhash"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
-
-[[package]]
-name = "getrandom"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "139ef39800118c7683f2fd3c98c1b23c09ae076556b435f8e9064ae108aaeeec"
-dependencies = [
- "cfg-if",
- "libc",
- "r-efi",
- "rand_core",
- "wasip2",
- "wasip3",
-]
-
 [[package]]
 name = "glob"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0cc23270f6e1808e30a928bdc84dea0b9b4136a8bc82338574f23baf47bbd280"

-[[package]]
-name = "hashbrown"
-version = "0.15.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
-dependencies = [
- "foldhash",
-]
-
-[[package]]
-name = "hashbrown"
-version = "0.16.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
-
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -266,24 +205,6 @@ dependencies = [
 "socket2",
 ]

-[[package]]
-name = "id-arena"
-version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
-
-[[package]]
-name = "indexmap"
-version = "2.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
-dependencies = [
- "equivalent",
- "hashbrown 0.16.1",
- "serde",
- "serde_core",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.17"
@@ -302,12 +223,6 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"

-[[package]]
-name = "leb128fmt"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
-
 [[package]]
 name = "libc"
 version = "0.2.182"
@@ -408,16 +323,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"

-[[package]]
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-version = "0.2.37"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
-dependencies = [
- "proc-macro2",
- "syn",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.106"
@@ -436,29 +341,6 @@ dependencies = [
 "proc-macro2",
 ]

-[[package]]
-name = "r-efi"
-version = "5.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
-
-[[package]]
-name = "rand"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc266eb313df6c5c09c1c7b1fbe2510961e5bcd3add930c1e31f7ed9da0feff8"
-dependencies = [
- "chacha20",
- "getrandom",
- "rand_core",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c8d0fd677905edcbeedbf2edb6494d676f0e98d54d5cf9bda0b061cb8fb8aba"
-
 [[package]]
 name = "regex"
 version = "1.12.3"
@@ -518,21 +400,6 @@ dependencies = [
 "windows-sys 0.61.2",
 ]

-[[package]]
-name = "semver"
-version = "1.0.27"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d767eb0aabc880b29956c35734170f26ed551a859dbd361d140cdbeca61ab1e2"
-
-[[package]]
-name = "serde"
-version = "1.0.228"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
-dependencies = [
- "serde_core",
-]
-
 [[package]]
 name = "serde_core"
 version = "1.0.228"
@@ -553,19 +420,6 @@ dependencies = [
 "syn",
 ]

-[[package]]
-name = "serde_json"
-version = "1.0.149"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
-dependencies = [
- "itoa",
- "memchr",
- "serde",
- "serde_core",
- "zmij",
-]
-
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -587,12 +441,12 @@ name = "sqm-autorate-rust"
 version = "0.2.0"
 dependencies = [
 "anyhow",
+ "fastrand",
 "icmp-socket",
 "libc",
 "log",
 "netlink-bindings",
 "netlink-socket2",
- "rand",
 "rust-uci",
 "rustix",
 "thiserror",
@@ -697,12 +551,6 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"

-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
-
 [[package]]
 name = "vec_map"
 version = "0.8.2"
@@ -715,58 +563,6 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"

-[[package]]
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-version = "1.0.2+wasi-0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9517f9239f02c069db75e65f174b3da828fe5f5b945c4dd26bd25d89c03ebcf5"
-dependencies = [
- "wit-bindgen",
-]
-
-[[package]]
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-version = "0.4.0+wasi-0.3.0-rc-2026-01-06"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "wit-bindgen",
-]
-
-[[package]]
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-version = "0.244.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "990065f2fe63003fe337b932cfb5e3b80e0b4d0f5ff650e6985b1048f62c8319"
-dependencies = [
- "leb128fmt",
- "wasmparser",
-]
-
-[[package]]
-name = "wasm-metadata"
-version = "0.244.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb0e353e6a2fbdc176932bbaab493762eb1255a7900fe0fea1a2f96c296cc909"
-dependencies = [
- "anyhow",
- "indexmap",
- "wasm-encoder",
- "wasmparser",
-]
-
-[[package]]
-name = "wasmparser"
-version = "0.244.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47b807c72e1bac69382b3a6fb3dbe8ea4c0ed87ff5629b8685ae6b9a611028fe"
-dependencies = [
- "bitflags 2.11.0",
- "hashbrown 0.15.5",
- "indexmap",
- "semver",
-]
-
 [[package]]
 name = "which"
 version = "3.1.1"
@@ -895,97 +691,3 @@ name = "windows_x86_64_msvc"
 version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d6bbff5f0aada427a1e5a6da5f1f98158182f26556f345ac9e04d36d0ebed650"
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
-dependencies = [
- "wit-bindgen-rust-macro",
-]
-
-[[package]]
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-version = "0.51.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea61de684c3ea68cb082b7a88508a8b27fcc8b797d738bfc99a82facf1d752dc"
-dependencies = [
- "anyhow",
- "heck",
- "wit-parser",
-]
-
-[[package]]
-name = "wit-bindgen-rust"
-version = "0.51.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7c566e0f4b284dd6561c786d9cb0142da491f46a9fbed79ea69cdad5db17f21"
-dependencies = [
- "anyhow",
- "heck",
- "indexmap",
- "prettyplease",
- "syn",
- "wasm-metadata",
- "wit-bindgen-core",
- "wit-component",
-]
-
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-dependencies = [
- "anyhow",
- "prettyplease",
- "proc-macro2",
- "quote",
- "syn",
- "wit-bindgen-core",
- "wit-bindgen-rust",
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-
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-dependencies = [
- "anyhow",
- "bitflags 2.11.0",
- "indexmap",
- "log",
- "serde",
- "serde_derive",
- "serde_json",
- "wasm-encoder",
- "wasm-metadata",
- "wasmparser",
- "wit-parser",
-]
-
-[[package]]
-name = "wit-parser"
-version = "0.244.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ecc8ac4bc1dc3381b7f59c34f00b67e18f910c2c0f50015669dde7def656a736"
-dependencies = [
- "anyhow",
- "id-arena",
- "indexmap",
- "log",
- "semver",
- "serde",
- "serde_derive",
- "serde_json",
- "unicode-xid",
- "wasmparser",
-]
-
-[[package]]
-name = "zmij"
-version = "1.0.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -23,7 +23,7 @@ anyhow = "1.0"
 icmp-socket = "0.4.0"
 netlink-bindings = { version = "0.2", features = ["rt-link", "tc"] }
 netlink-socket2 = "0.2"
-rand = "0.10"
+fastrand = "2"
 rustix = { version = "1.1", features = ["fs", "thread", "time"] }
 rust-uci = { version = "0.1", optional = true }
 thiserror = "2.0"
@@ -1,8 +1,6 @@
 use crate::netlink::{Netlink, NetlinkError, Qdisc};
 use crate::{Config, ReflectorStats};
 use log::{debug, info, warn};
-use rand::seq::IndexedRandom;
-use rand::{RngExt, rng};
 use std::collections::HashMap;
 use std::fs::File;
 use std::io::Write;
@@ -51,7 +49,7 @@ fn generate_initial_speeds(base_speed: f64, size: u32) -> Vec<f64> {
    let mut rates = Vec::new();

    for _ in 0..size {
-        rates.push((rng().random_range(0.0..1.0) as f64 * 0.2 + 0.75) * base_speed);
+        rates.push((fastrand::f64() * 0.2 + 0.75) * base_speed);
    }

    rates
@@ -183,8 +181,7 @@ impl Ratecontroller {
                }

                if state.delta_stat > delay_ms {
-                    let mut rng = rng();
-                    match state.safe_rates.choose(&mut rng) {
+                    match state.safe_rates.get(fastrand::usize(..state.safe_rates.len())) {
                        Some(rnd_rate) => {
                            state.next_rate =
                                rnd_rate.min(0.9 * state.current_rate * state.load);
@@ -1,7 +1,5 @@
 use crate::{Config, ReflectorStats};
 use log::{debug, info};
-use rand::seq::IndexedRandom;
-use rand::{RngExt, rng};
 use std::collections::HashMap;
 use std::net::IpAddr;
 use std::sync::mpsc::Receiver;
@@ -24,8 +22,6 @@ impl ReflectorSelector {
        let baseline_sleep_time =
            Duration::from_secs_f64(self.config.tick_interval * std::f64::consts::PI);

-        let mut rng = rng();
-
        // Initial wait of several seconds to allow some OWD data to build up
        sleep(baseline_sleep_time);

@@ -57,7 +53,7 @@ impl ReflectorSelector {
            }

            for _ in 0..20 {
-                let next_candidate = self.reflector_pool.choose(&mut rng).unwrap();
+                let next_candidate = &self.reflector_pool[fastrand::usize(..self.reflector_pool.len())];
                if next_peers.contains(next_candidate) {
                    continue;
                }
@@ -110,7 +106,7 @@ impl ReflectorSelector {

            // Shuffle the deck so we avoid overwhelming good reflectors (Fisher-Yates)
            for i in (1_usize..candidates.len()).rev() {
-                let j = rng.random_range(0..(i + 1));
+                let j = fastrand::usize(0..=i);
                candidates.swap(i, j);
            }