Changes HashMap to use aHash instead, giving a performance boost. (#9391)

# Description

see https://github.com/nushell/nushell/issues/9390
using `ahash` instead of the default hasher. this will not affect
compile time as we where already building `ahash`.


# User-Facing Changes
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# Tests + Formatting
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crates/nu-protocol/src/ast/call.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 
 use serde::{Deserialize, Serialize};
 

crates/nu-protocol/src/ast/import_pattern.rs

@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 use crate::{span, ModuleId, Span};
-use std::collections::HashSet;
+use ahash::{HashSet, HashSetExt};
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub enum ImportPatternMember {

crates/nu-protocol/src/config.rs

@@ -1,6 +1,6 @@
 use crate::{ShellError, Span, Value};
+use ahash::{HashMap, HashMapExt};
 use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
 
 const TRIM_STRATEGY_DEFAULT: TrimStrategy = TrimStrategy::Wrap {
     try_to_keep_words: true,

crates/nu-protocol/src/engine/capture_block.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::HashMap;
 
 use crate::{BlockId, Value, VarId};
 

crates/nu-protocol/src/engine/engine_state.rs

@@ -7,17 +7,15 @@ use crate::{
     Signature, Span, Type, VarId, Variable, VirtualPathId,
 };
 use crate::{ParseError, Value};
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use core::panic;
 use std::borrow::Borrow;
 use std::num::NonZeroUsize;
 use std::path::Path;
 use std::path::PathBuf;
-use std::{
-    collections::{HashMap, HashSet},
-    sync::{
-        atomic::{AtomicBool, AtomicU32},
-        Arc, Mutex,
-    },
+use std::sync::{
+    atomic::{AtomicBool, AtomicU32},
+    Arc, Mutex,
 };
 
 static PWD_ENV: &str = "PWD";
@@ -170,7 +168,9 @@ impl EngineState {
                 false,
             ),
             ctrlc: None,
-            env_vars: EnvVars::from([(DEFAULT_OVERLAY_NAME.to_string(), HashMap::new())]),
+            env_vars: [(DEFAULT_OVERLAY_NAME.to_string(), HashMap::new())]
+                .into_iter()
+                .collect(),
             previous_env_vars: HashMap::new(),
             config: Config::default(),
             pipeline_externals_state: Arc::new((AtomicU32::new(0), AtomicU32::new(0))),
@@ -436,7 +436,7 @@ impl EngineState {
             env_vars.insert(name, val);
         } else {
             self.env_vars
-                .insert(overlay_name, HashMap::from([(name, val)]));
+                .insert(overlay_name, [(name, val)].into_iter().collect());
         }
     }
 

crates/nu-protocol/src/engine/overlay.rs

@@ -1,6 +1,6 @@
 use crate::{DeclId, ModuleId, OverlayId, Type, Value, VarId};
+use ahash::{HashMap, HashMapExt};
 use std::borrow::Borrow;
-use std::collections::HashMap;
 use std::hash::{Hash, Hasher};
 
 pub static DEFAULT_OVERLAY_NAME: &str = "zero";

crates/nu-protocol/src/engine/stack.rs

@@ -1,4 +1,4 @@
-use std::collections::{HashMap, HashSet};
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 
 use crate::engine::EngineState;
 use crate::engine::DEFAULT_OVERLAY_NAME;
@@ -154,13 +154,14 @@ impl Stack {
                 if let Some(env_vars) = scope.get_mut(last_overlay) {
                     env_vars.insert(var, value);
                 } else {
-                    scope.insert(last_overlay.into(), HashMap::from([(var, value)]));
+                    scope.insert(last_overlay.into(), [(var, value)].into_iter().collect());
                 }
             } else {
-                self.env_vars.push(HashMap::from([(
-                    last_overlay.into(),
-                    HashMap::from([(var, value)]),
-                )]));
+                self.env_vars.push(
+                    [(last_overlay.into(), [(var, value)].into_iter().collect())]
+                        .into_iter()
+                        .collect(),
+                );
             }
         } else {
             // TODO: Remove panic
@@ -394,7 +395,7 @@ impl Stack {
                         env_hidden.insert(name.into());
                     } else {
                         self.env_hidden
-                            .insert(active_overlay.into(), HashSet::from([name.into()]));
+                            .insert(active_overlay.into(), [name.into()].into_iter().collect());
                     }
 
                     return true;

crates/nu-protocol/src/value/from_value.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use ahash::{HashMap, HashMapExt};
 use std::path::PathBuf;
 use std::str::FromStr;
 

crates/nu-protocol/src/value/mod.rs

@@ -11,6 +11,7 @@ use crate::ast::{Math, Operator};
 use crate::engine::EngineState;
 use crate::ShellError;
 use crate::{did_you_mean, BlockId, Config, Span, Spanned, Type, VarId};
+use ahash::HashMap;
 use byte_unit::ByteUnit;
 use chrono::{DateTime, Duration, FixedOffset};
 use chrono_humanize::HumanTime;
@@ -25,7 +26,6 @@ pub use range::*;
 use serde::{Deserialize, Serialize};
 use std::{
     borrow::Cow,
-    collections::HashMap,
     fmt::{Display, Formatter, Result as FmtResult},
     iter,
     path::PathBuf,