From eea43c7cd6fd3fe481d2a74a14a2db3e7a520999 Mon Sep 17 00:00:00 2001
From: zonyitoo <zonyitoo@gmail.com>
Date: Sun, 28 Jul 2024 14:54:24 +0800
Subject: [PATCH] feat: ServerScore replaced stdev with MAD

---
 Cargo.lock                                    | 217 +++++++++---------
 .../src/local/loadbalancing/server_stat.rs    |  34 ++-
 2 files changed, 129 insertions(+), 122 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index abf5ad8ab441..0217f8120be1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -121,9 +121,9 @@ dependencies = [
 
 [[package]]
 name = "anstream"
-version = "0.6.14"
+version = "0.6.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "418c75fa768af9c03be99d17643f93f79bbba589895012a80e3452a19ddda15b"
+checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
 dependencies = [
  "anstyle",
  "anstyle-parse",
@@ -136,33 +136,33 @@ dependencies = [
 
 [[package]]
 name = "anstyle"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "038dfcf04a5feb68e9c60b21c9625a54c2c0616e79b72b0fd87075a056ae1d1b"
+checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
 
 [[package]]
 name = "anstyle-parse"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c03a11a9034d92058ceb6ee011ce58af4a9bf61491aa7e1e59ecd24bd40d22d4"
+checksum = "eb47de1e80c2b463c735db5b217a0ddc39d612e7ac9e2e96a5aed1f57616c1cb"
 dependencies = [
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle-query"
-version = "1.1.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad186efb764318d35165f1758e7dcef3b10628e26d41a44bc5550652e6804391"
+checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a"
 dependencies = [
  "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "anstyle-wincon"
-version = "3.0.3"
+version = "3.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61a38449feb7068f52bb06c12759005cf459ee52bb4adc1d5a7c4322d716fb19"
+checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
 dependencies = [
  "anstyle",
  "windows-sys 0.52.0",
@@ -182,9 +182,9 @@ checksum = "69f7f8c3906b62b754cd5326047894316021dcfe5a194c8ea52bdd94934a3457"
 
 [[package]]
 name = "arrayref"
-version = "0.3.7"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b4930d2cb77ce62f89ee5d5289b4ac049559b1c45539271f5ed4fdc7db34545"
+checksum = "9d151e35f61089500b617991b791fc8bfd237ae50cd5950803758a179b41e67a"
 
 [[package]]
 name = "arrayvec"
@@ -194,9 +194,9 @@ checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
 
 [[package]]
 name = "async-compression"
-version = "0.4.11"
+version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd066d0b4ef8ecb03a55319dc13aa6910616d0f44008a045bb1835af830abff5"
+checksum = "fec134f64e2bc57411226dfc4e52dec859ddfc7e711fc5e07b612584f000e4aa"
 dependencies = [
  "brotli",
  "flate2",
@@ -216,7 +216,7 @@ checksum = "6e0c28dcc82d7c8ead5cb13beb15405b57b8546e93215673ff8ca0349a028107"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -391,7 +391,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -450,13 +450,12 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.1.4"
+version = "1.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9711f33475c22aab363b05564a17d7b789bf3dfec5ebabb586adee56f0e271b5"
+checksum = "2aba8f4e9906c7ce3c73463f62a7f0c65183ada1a2d47e397cc8810827f9694f"
 dependencies = [
  "jobserver",
  "libc",
- "once_cell",
 ]
 
 [[package]]
@@ -532,18 +531,18 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.9"
+version = "4.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64acc1846d54c1fe936a78dc189c34e28d3f5afc348403f28ecf53660b9b8462"
+checksum = "35723e6a11662c2afb578bcf0b88bf6ea8e21282a953428f240574fcc3a2b5b3"
 dependencies = [
  "clap_builder",
 ]
 
 [[package]]
 name = "clap_builder"
-version = "4.5.9"
+version = "4.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6fb8393d67ba2e7bfaf28a23458e4e2b543cc73a99595511eb207fdb8aede942"
+checksum = "49eb96cbfa7cfa35017b7cd548c75b14c3118c98b423041d70562665e07fb0fa"
 dependencies = [
  "anstream",
  "anstyle",
@@ -554,9 +553,9 @@ dependencies = [
 
 [[package]]
 name = "clap_lex"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b82cf0babdbd58558212896d1a4272303a57bdb245c2bf1147185fb45640e70"
+checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
 
 [[package]]
 name = "cmake"
@@ -569,9 +568,9 @@ dependencies = [
 
 [[package]]
 name = "colorchoice"
-version = "1.0.1"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
+checksum = "d3fd119d74b830634cea2a0f58bbd0d54540518a14397557951e79340abc28c0"
 
 [[package]]
 name = "const-oid"
@@ -710,7 +709,7 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -798,7 +797,7 @@ checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -858,14 +857,14 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "env_filter"
-version = "0.1.0"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a009aa4810eb158359dda09d0c87378e4bbb89b5a801f016885a4707ba24f7ea"
+checksum = "4f2c92ceda6ceec50f43169f9ee8424fe2db276791afde7b2cd8bc084cb376ab"
 dependencies = [
  "log",
  "regex",
@@ -873,9 +872,9 @@ dependencies = [
 
 [[package]]
 name = "env_logger"
-version = "0.11.3"
+version = "0.11.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38b35839ba51819680ba087cd351788c9a3c476841207e0b8cee0b04722343b9"
+checksum = "e13fa619b91fb2381732789fc5de83b45675e882f66623b7d8cb4f643017018d"
 dependencies = [
  "anstream",
  "anstyle",
@@ -1067,7 +1066,7 @@ checksum = "87750cf4b7a4c0625b1529e4c543c2182106e4dedc60a2a6455e00d212c489ac"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -1457,7 +1456,7 @@ dependencies = [
  "http 1.1.0",
  "hyper",
  "hyper-util",
- "rustls 0.23.11",
+ "rustls 0.23.12",
  "rustls-native-certs 0.7.1",
  "rustls-pki-types",
  "tokio",
@@ -1640,7 +1639,7 @@ checksum = "1ec89e9337638ecdc08744df490b221a7399bf8d164eb52a665454e60e075ad6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -1752,9 +1751,9 @@ dependencies = [
 
 [[package]]
 name = "is_terminal_polyfill"
-version = "1.70.0"
+version = "1.70.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8478577c03552c21db0e2724ffb8986a5ce7af88107e6be5d2ee6e158c12800"
+checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
 
 [[package]]
 name = "itoa"
@@ -1784,9 +1783,9 @@ dependencies = [
 
 [[package]]
 name = "jobserver"
-version = "0.1.31"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2b099aaa34a9751c5bf0878add70444e1ed2dd73f347be99003d4577277de6e"
+checksum = "48d1dbcbbeb6a7fec7e059840aa538bd62aaccf972c7346c4d9d2059312853d0"
 dependencies = [
  "libc",
 ]
@@ -1845,9 +1844,9 @@ checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
 [[package]]
 name = "libloading"
-version = "0.8.4"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e310b3a6b5907f99202fcdb4960ff45b93735d7c7d96b760fcff8db2dc0e103d"
+checksum = "4979f22fdb869068da03c9f7528f8297c6fd2606bc3a4affe42e6a823fdb8da4"
 dependencies = [
  "cfg-if",
  "windows-targets 0.52.6",
@@ -2032,6 +2031,18 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "mio"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4569e456d394deccd22ce1c1913e6ea0e54519f577285001215d33557431afe4"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "wasi",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "native-tls"
 version = "0.2.12"
@@ -2075,7 +2086,7 @@ dependencies = [
  "kqueue",
  "libc",
  "log",
- "mio",
+ "mio 0.8.11",
  "walkdir",
  "windows-sys 0.48.0",
 ]
@@ -2105,16 +2116,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "num_cpus"
-version = "1.16.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
-dependencies = [
- "hermit-abi",
- "libc",
-]
-
 [[package]]
 name = "num_threads"
 version = "0.1.7"
@@ -2126,9 +2127,9 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.36.1"
+version = "0.36.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "081b846d1d56ddfc18fdf1a922e4f6e07a11768ea1b92dec44e42b72712ccfce"
+checksum = "3f203fa8daa7bb185f760ae12bd8e097f63d17041dcdcaf675ac54cdf863170e"
 dependencies = [
  "memchr",
 ]
@@ -2168,7 +2169,7 @@ checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -2284,7 +2285,7 @@ checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall 0.5.2",
+ "redox_syscall 0.5.3",
  "smallvec",
  "windows-targets 0.52.6",
 ]
@@ -2326,7 +2327,7 @@ dependencies = [
  "pest_meta",
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -2357,7 +2358,7 @@ checksum = "2f38a4412a78282e09a2cf38d195ea5420d15ba0602cb375210efbc877243965"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -2503,9 +2504,9 @@ dependencies = [
  "bytes",
  "pin-project-lite",
  "quinn-proto 0.11.3",
- "quinn-udp 0.5.2",
+ "quinn-udp 0.5.4",
  "rustc-hash",
- "rustls 0.23.11",
+ "rustls 0.23.12",
  "thiserror",
  "tokio",
  "tracing",
@@ -2538,7 +2539,7 @@ dependencies = [
  "rand",
  "ring 0.17.8",
  "rustc-hash",
- "rustls 0.23.11",
+ "rustls 0.23.12",
  "slab",
  "thiserror",
  "tinyvec",
@@ -2560,14 +2561,13 @@ dependencies = [
 
 [[package]]
 name = "quinn-udp"
-version = "0.5.2"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9096629c45860fc7fb143e125eb826b5e721e10be3263160c7d60ca832cf8c46"
+checksum = "8bffec3605b73c6f1754535084a85229fa8a30f86014e6c81aeec4abb68b0285"
 dependencies = [
  "libc",
  "once_cell",
  "socket2",
- "tracing",
  "windows-sys 0.52.0",
 ]
 
@@ -2636,9 +2636,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c82cf8cff14456045f55ec4241383baeff27af886adb72ffb2162f99911de0fd"
+checksum = "2a908a6e00f1fdd0dfd9c0eb08ce85126f6d8bbda50017e74bc4a4b7d4a926a4"
 dependencies = [
  "bitflags 2.6.0",
 ]
@@ -2728,7 +2728,7 @@ dependencies = [
  "percent-encoding",
  "pin-project-lite",
  "quinn 0.11.2",
- "rustls 0.23.11",
+ "rustls 0.23.12",
  "rustls-native-certs 0.7.1",
  "rustls-pemfile 2.1.2",
  "rustls-pki-types",
@@ -2889,15 +2889,15 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.11"
+version = "0.23.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4828ea528154ae444e5a642dbb7d5623354030dc9822b83fd9bb79683c7399d0"
+checksum = "c58f8c84392efc0a126acce10fa59ff7b3d2ac06ab451a33f2741989b806b044"
 dependencies = [
  "log",
  "once_cell",
  "ring 0.17.8",
  "rustls-pki-types",
- "rustls-webpki 0.102.5",
+ "rustls-webpki 0.102.6",
  "subtle",
  "zeroize",
 ]
@@ -2964,9 +2964,9 @@ dependencies = [
 
 [[package]]
 name = "rustls-webpki"
-version = "0.102.5"
+version = "0.102.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9a6fccd794a42c2c105b513a2f62bc3fd8f3ba57a4593677ceb0bd035164d78"
+checksum = "8e6b52d4fda176fd835fdc55a835d4a89b8499cad995885a21149d5ad62f852e"
 dependencies = [
  "ring 0.17.8",
  "rustls-pki-types",
@@ -3095,7 +3095,7 @@ checksum = "e0cd7e117be63d3c3678776753929474f3b04a43a080c744d6b0ae2a8c28e222"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -3488,9 +3488,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.71"
+version = "2.0.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b146dcf730474b4bcd16c311627b31ede9ab149045db4d6088b3becaea046462"
+checksum = "dc4b9b9bf2add8093d3f2c0204471e951b2285580335de42f9d2534f3ae7a8af"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3511,7 +3511,7 @@ checksum = "c8af7666ab7b6390ab78131fb5b0fce11d6b7a6951602017c35fa82800708971"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -3601,14 +3601,14 @@ checksum = "a4558b58466b9ad7ca0f102865eccc95938dca1a74a856f2b57b6629050da261"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "thread-id"
-version = "4.2.1"
+version = "4.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0ec81c46e9eb50deaa257be2f148adf052d1fb7701cfd55ccfab2525280b70b"
+checksum = "cfe8f25bbdd100db7e1d34acf7fd2dc59c4bf8f7483f505eaa7d4f12f76cc0ea"
 dependencies = [
  "libc",
  "winapi",
@@ -3684,32 +3684,31 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.38.0"
+version = "1.39.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba4f4a02a7a80d6f274636f0aa95c7e383b912d41fe721a31f29e29698585a4a"
+checksum = "daa4fb1bc778bd6f04cbfc4bb2d06a7396a8f299dc33ea1900cedaa316f467b1"
 dependencies = [
  "backtrace",
  "bytes",
  "libc",
- "mio",
- "num_cpus",
+ "mio 1.0.1",
  "parking_lot 0.12.3",
  "pin-project-lite",
  "signal-hook-registry",
  "socket2",
  "tokio-macros",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "tokio-macros"
-version = "2.3.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f5ae998a069d4b5aba8ee9dad856af7d520c3699e6159b185c2acd48155d39a"
+checksum = "693d596312e88961bc67d7f1f97af8a70227d9f90c31bba5806eec004978d752"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -3738,7 +3737,7 @@ version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c7bc40d0e5a97695bb96e27995cd3a08538541b0a846f65bba7a359f36700d4"
 dependencies = [
- "rustls 0.23.11",
+ "rustls 0.23.12",
  "rustls-pki-types",
  "tokio",
 ]
@@ -3820,7 +3819,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -3871,9 +3870,9 @@ checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
 [[package]]
 name = "tun2"
-version = "2.0.2"
+version = "2.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa06f8128a534de505cae0a1d394ca3f7acb8504580b24d23ba774c48baaa98e"
+checksum = "50ff242bea1c5ceb9b6aa4918cf340a6c157e1328a2389c5353cf91049d8cf17"
 dependencies = [
  "bytes",
  "cfg-if",
@@ -4023,9 +4022,9 @@ checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
 [[package]]
 name = "version_check"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
 [[package]]
 name = "walkdir"
@@ -4073,7 +4072,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
  "wasm-bindgen-shared",
 ]
 
@@ -4107,7 +4106,7 @@ checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -4180,16 +4179,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
-dependencies = [
- "windows-core",
- "windows-targets 0.52.6",
-]
-
 [[package]]
 name = "windows-core"
 version = "0.52.0"
@@ -4371,15 +4360,15 @@ dependencies = [
 
 [[package]]
 name = "wintun"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b3c8c8876c686f8a2d6376999ac1c9a24c74d2968551c9394f7e89127783685"
+checksum = "b196f9328341b035820c54beebca487823e2e20a5977f284f2af2a0ee8f04400"
 dependencies = [
  "c2rust-bitfields",
  "libloading",
  "log",
  "thiserror",
- "windows",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4429,7 +4418,7 @@ checksum = "28cc31741b18cb6f1d5ff12f5b7523e3d6eb0852bbbad19d73905511d9849b95"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
  "synstructure",
 ]
 
@@ -4450,7 +4439,7 @@ checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -4470,7 +4459,7 @@ checksum = "0ea7b4a3637ea8669cedf0f1fd5c286a17f3de97b8dd5a70a6c167a1730e63a5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
  "synstructure",
 ]
 
@@ -4499,7 +4488,7 @@ checksum = "6eafa6dfb17584ea3e2bd6e76e0cc15ad7af12b09abdd1ca55961bed9b1063c6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.71",
+ "syn 2.0.72",
 ]
 
 [[package]]
diff --git a/crates/shadowsocks-service/src/local/loadbalancing/server_stat.rs b/crates/shadowsocks-service/src/local/loadbalancing/server_stat.rs
index 9091ac20d7f5..c366896f88ba 100644
--- a/crates/shadowsocks-service/src/local/loadbalancing/server_stat.rs
+++ b/crates/shadowsocks-service/src/local/loadbalancing/server_stat.rs
@@ -33,6 +33,8 @@ pub struct ServerStatData {
     pub latency_stdev: f64,
     /// Score's average
     pub latency_mean: f64,
+    /// Score's median absolute deviation
+    pub latency_mad: f64,
 }
 
 /// Statistic of a remote server
@@ -77,6 +79,7 @@ impl ServerStat {
                 fail_rate: 1.0,
                 latency_stdev: max_latency_stdev,
                 latency_mean: max_server_rtt as f64,
+                latency_mad: max_server_rtt as f64,
             },
         }
     }
@@ -86,24 +89,27 @@ impl ServerStat {
         let nrtt = self.data.latency_median as f64 / self.max_server_rtt as f64;
 
         // Normalize stdev
-        let nstdev = self.data.latency_stdev / self.max_latency_stdev;
+        // let nstdev = self.data.latency_stdev / self.max_latency_stdev;
+        // Mormalize mad
+        let nmad = self.data.latency_mad / self.max_server_rtt as f64;
 
         const SCORE_RTT_WEIGHT: f64 = 1.0;
         const SCORE_FAIL_WEIGHT: f64 = 3.0;
-        const SCORE_STDEV_WEIGHT: f64 = 1.0;
+        // const SCORE_STDEV_WEIGHT: f64 = 0.0;
+        const SCORE_MAD_WEIGHT: f64 = 1.0;
 
         // [EPSILON, 1]
         // Just for avoiding divide by 0
         let user_weight = self.user_weight.max(f32::EPSILON);
 
-        // Score = (norm_lat * 1.0 + prop_err * 3.0 + stdev * 1.0) / 5.0 / user_weight
+        // Score = (norm_lat * 1.0 + prop_err * 3.0 + (stdev || mad) * 1.0) / 5.0 / user_weight
         //
         // 1. The lower latency, the better
         // 2. The lower errored count, the better
-        // 3. The lower latency's stdev, the better
+        // 3. The lower latency's stdev / mad, the better
         // 4. The higher user's weight, the better
-        let score = (nrtt * SCORE_RTT_WEIGHT + self.data.fail_rate * SCORE_FAIL_WEIGHT + nstdev * SCORE_STDEV_WEIGHT)
-            / (SCORE_RTT_WEIGHT + SCORE_FAIL_WEIGHT + SCORE_STDEV_WEIGHT)
+        let score = (nrtt * SCORE_RTT_WEIGHT + self.data.fail_rate * SCORE_FAIL_WEIGHT + nmad * SCORE_MAD_WEIGHT)
+            / (SCORE_RTT_WEIGHT + SCORE_FAIL_WEIGHT + SCORE_MAD_WEIGHT)
             / user_weight as f64;
 
         // Times 10000 converts to u32, for 0.0001 precision
@@ -146,6 +152,8 @@ impl ServerStat {
 
         self.data.latency_stdev = self.max_latency_stdev;
         self.data.latency_mean = self.max_server_rtt as f64;
+        self.data.latency_mad = self.max_server_rtt as f64;
+
         if !vlat.is_empty() {
             vlat.sort_unstable();
 
@@ -159,23 +167,33 @@ impl ServerStat {
             };
 
             if vlat.len() > 1 {
-                // STDEV
                 let n = vlat.len() as f64;
 
+                // mean
                 let mut total_lat = 0;
                 for s in &vlat {
                     total_lat += *s;
                 }
                 self.data.latency_mean = total_lat as f64 / n;
+
+                // STDEV
                 let mut acc_diff = 0.0;
                 for s in &vlat {
                     let diff = *s as f64 - self.data.latency_mean;
                     acc_diff += diff * diff;
                 }
                 // Corrected Sample Standard Deviation
-                self.data.latency_stdev = ((1.0 / (n - 1.0)) * acc_diff).sqrt();
+                self.data.latency_stdev = (acc_diff / (n - 1.0)).sqrt();
+
+                // MAD
+                let mut acc_abs_diff = 0.0;
+                for s in &vlat {
+                    acc_abs_diff += (*s as f64 - self.data.latency_median as f64).abs();
+                }
+                self.data.latency_mad = acc_abs_diff / n;
             } else {
                 self.data.latency_mean = vlat[0] as f64;
+                self.data.latency_mad = self.data.latency_mean; // mean = median in this case
             }
         }