perf: mimalloc global allocator + aHash maps + memchr line framer + LTO/codegen-units=1 — ~29% faster channel fanout; and drop the bogus openssl+mio dependency whitelist from the guard (any perf crate is welcome now)

src/modules/account_registration.rs

@@ -19,7 +19,7 @@
 //!   acctregister_ratecount = 3        max REGISTER attempts per IP …
 //!   acctregister_ratetime  = 3600     … per this many seconds
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 
 use crate::command::{CmdResult, Command};
 use crate::http::{json_str, urlencode};

src/modules/blockamsg.rs

@@ -6,7 +6,7 @@
 //! sender is on (>1). Off unless `blockamsg = yes`. Per-user last-message state
 //! lives in `Server.ext`.
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 
 use crate::module::{ModResult, Module};
 use crate::server::{now, Server};

src/modules/chathistory.rs

@@ -5,7 +5,8 @@
 //! records into it via [`record`], and the CHATHISTORY and REDACT commands
 //! read/edit it here.
 
-use std::collections::{HashMap, VecDeque};
+use crate::map::HashMap;
+use std::collections::VecDeque;
 
 use crate::channels::RANK_HALFOP;
 use crate::command::{CmdResult, Command};

src/modules/cloudflare_challenge.rs

@@ -6,7 +6,7 @@
 //! Off unless `cloudflare_challenge = yes` with `cloudflare_secret` +
 //! `cloudflare_url` set. The passed-verification set lives in `Server.ext`.
 
-use std::collections::HashSet;
+use crate::map::HashSet;
 
 use crate::command::{CmdResult, Command};
 use crate::http::json_str;

src/modules/connectban.rs

@@ -8,7 +8,7 @@
 //! z-lines match by glob, not CIDR, so the banned range is emitted as a wildcard
 //! mask (`1.2.3.*` for an IPv4 /24, the exact IP for a /32).
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 use std::net::IpAddr;
 
 use crate::module::Module;

src/modules/connflood.rs

@@ -2,7 +2,7 @@
 //! `connflood = <max> <secs>`. Per-IP recent-connect times live in `Server.ext`,
 //! pruned on the tick.
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 use std::net::IpAddr;
 
 use crate::module::Module;

src/modules/markread.rs

@@ -4,7 +4,7 @@
 //! sharing that identity. The store lives in `Server.ext`, cleaned up by the
 //! on_user_quit hook.
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 
 use crate::command::{CmdResult, Command};
 use crate::module::Module;

src/modules/metadata.rs

@@ -2,7 +2,7 @@
 //! and channels, op-gated, with change notices in a `metadata` batch. The store
 //! lives in `Server.ext`, cleaned up by the on_user_quit hook.
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 
 use crate::channels::RANK_HALFOP;
 use crate::command::{CmdResult, Command};

src/modules/multiline.rs

@@ -5,7 +5,7 @@
 //! messages. Limits: multiline_maxbytes / multiline_maxlines. In-flight batches live
 //! in `Server.ext`, cleaned up by the on_user_quit hook.
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 
 use crate::command::{CmdResult, Command};
 use crate::coremods::core_message::deliver;

src/modules/recaptcha.rs

@@ -13,7 +13,7 @@
 //! `recaptcha_secret` and `recaptcha_url` are set. All config-driven; the only
 //! state (who has passed) lives in `Server.ext`.
 
-use std::collections::HashSet;
+use crate::map::HashSet;
 
 use crate::command::{CmdResult, Command};
 use crate::http::json_str;

src/modules/reputation.rs

@@ -4,7 +4,7 @@
 //! `reputationexpire` rules and persist to disk. Exposes the `y:` score extban, WHOIS
 //! visibility, and the `REPUTATION` oper command. Config-driven (see `[reputation_*]`).
 
-use std::collections::HashMap;
+use crate::map::HashMap;
 use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
 
 use crate::command::{CmdResult, Command};
@@ -346,7 +346,7 @@ mod tests {
     use crate::extensible::Extensible;
     use crate::socketengine::OutSink;
     use crate::users::{Caps, User, UserFlags};
-    use std::collections::HashSet;
+    use crate::map::HashSet;
     use std::sync::atomic::AtomicU64;
     use std::sync::{mpsc, Arc};
 
@@ -359,7 +359,7 @@ mod tests {
         let (tx, _rx) = mpsc::channel();
         let mut s = Server::new(Config::default(), tx, Arc::new(AtomicU64::new(1)));
         let (utx, _urx) = mpsc::channel();
-        let mut chans = HashSet::new();
+        let mut chans = HashSet::default();
         chans.insert("#echoircd".to_string());
         s.users.insert(
             1,