diff --git a/askama_derive/src/config.rs b/askama_derive/src/config.rs
index 079d8259..afc23b52 100644
--- a/askama_derive/src/config.rs
+++ b/askama_derive/src/config.rs
@@ -1,5 +1,5 @@
 use std::borrow::{Borrow, Cow};
-use std::collections::btree_map::{BTreeMap, Entry};
+use std::collections::hash_map::Entry;
 use std::mem::ManuallyDrop;
 use std::ops::Deref;
 use std::path::{Path, PathBuf};
@@ -12,12 +12,12 @@ use proc_macro2::Span;
 #[cfg(feature = "config")]
 use serde_derive::Deserialize;
 
-use crate::{CompileError, FileInfo, OnceMap};
+use crate::{CompileError, FileInfo, HashMap, OnceMap};
 
 #[derive(Debug)]
 pub(crate) struct Config {
     pub(crate) dirs: Vec<PathBuf>,
-    pub(crate) syntaxes: BTreeMap<String, SyntaxAndCache<'static>>,
+    pub(crate) syntaxes: HashMap<String, SyntaxAndCache<'static>>,
     pub(crate) default_syntax: &'static str,
     pub(crate) escapers: Vec<(Vec<Cow<'static, str>>, Cow<'static, str>)>,
     pub(crate) whitespace: Whitespace,
@@ -107,7 +107,7 @@ impl Config {
 
         let default_dirs = vec![root.join("templates")];
 
-        let mut syntaxes = BTreeMap::new();
+        let mut syntaxes = HashMap::default();
         syntaxes.insert(DEFAULT_SYNTAX_NAME.to_string(), SyntaxAndCache::default());
 
         let raw = if s.is_empty() {
diff --git a/askama_derive/src/generator.rs b/askama_derive/src/generator.rs
index e3f59f16..5d5cc7b0 100644
--- a/askama_derive/src/generator.rs
+++ b/askama_derive/src/generator.rs
@@ -4,7 +4,6 @@ mod helpers;
 mod node;
 
 use std::borrow::Cow;
-use std::collections::hash_map::HashMap;
 use std::env::current_dir;
 use std::ops::Deref;
 use std::path::{Path, PathBuf};
@@ -15,7 +14,6 @@ use parser::node::{Call, Macro, Whitespace};
 use parser::{CharLit, Expr, FloatKind, IntKind, Num, StrLit, WithSpan};
 use proc_macro2::TokenStream;
 use quote::{ToTokens, quote_spanned};
-use rustc_hash::FxBuildHasher;
 use syn::Token;
 
 use crate::generator::helpers::{clean_path, diff_paths};
@@ -23,12 +21,12 @@ use crate::heritage::{Context, Heritage};
 use crate::html::write_escaped_str;
 use crate::input::{Source, TemplateInput};
 use crate::integration::{Buffer, impl_everything, write_header};
-use crate::{CompileError, FileInfo, field_new, quote_into};
+use crate::{CompileError, FileInfo, HashMap, field_new, quote_into};
 
 pub(crate) fn template_to_string(
     buf: &mut Buffer,
     input: &TemplateInput<'_>,
-    contexts: &HashMap<&Arc<Path>, Context<'_>, FxBuildHasher>,
+    contexts: &HashMap<&Arc<Path>, Context<'_>>,
     heritage: Option<&Heritage<'_, '_>>,
     tmpl_kind: TmplKind<'_>,
 ) -> Result<usize, CompileError> {
@@ -69,7 +67,7 @@ struct Generator<'a, 'h> {
     /// The template input state: original struct AST and attributes
     input: &'a TemplateInput<'a>,
     /// All contexts, keyed by the package-relative template path
-    contexts: &'a HashMap<&'a Arc<Path>, Context<'a>, FxBuildHasher>,
+    contexts: &'a HashMap<&'a Arc<Path>, Context<'a>>,
     /// The heritage contains references to blocks and their ancestry
     heritage: Option<&'h Heritage<'a, 'h>>,
     /// Variables accessible directly from the current scope (not redirected to context)
@@ -102,7 +100,7 @@ enum CallerDir {
 impl<'a, 'h> Generator<'a, 'h> {
     fn new(
         input: &'a TemplateInput<'a>,
-        contexts: &'a HashMap<&'a Arc<Path>, Context<'a>, FxBuildHasher>,
+        contexts: &'a HashMap<&'a Arc<Path>, Context<'a>>,
         heritage: Option<&'h Heritage<'a, 'h>>,
         locals: MapChain<'a>,
         buf_writable_discard: bool,
@@ -619,7 +617,7 @@ impl<'a> LocalMeta<'a> {
 }
 
 struct MapChain<'a> {
-    scopes: Vec<HashMap<Cow<'a, str>, LocalMeta<'a>, FxBuildHasher>>,
+    scopes: Vec<HashMap<Cow<'a, str>, LocalMeta<'a>>>,
 }
 
 impl<'a> MapChain<'a> {
diff --git a/askama_derive/src/generator/helpers/macro_invocation.rs b/askama_derive/src/generator/helpers/macro_invocation.rs
index 3e97998d..5b5eec9a 100644
--- a/askama_derive/src/generator/helpers/macro_invocation.rs
+++ b/askama_derive/src/generator/helpers/macro_invocation.rs
@@ -1,19 +1,17 @@
 use core::fmt;
 use std::borrow::Cow;
-use std::collections::HashMap;
 use std::fmt::Write;
 use std::mem;
 
 use parser::node::{Call, Macro, Ws};
 use parser::{Expr, Span, WithSpan};
 use quote::quote_spanned;
-use rustc_hash::FxBuildHasher;
 
 use crate::generator::node::AstLevel;
 use crate::generator::{Generator, LocalMeta, is_copyable};
 use crate::heritage::Context;
 use crate::integration::Buffer;
-use crate::{CompileError, field_new, quote_into};
+use crate::{CompileError, HashMap, field_new, quote_into};
 
 /// Helper to generate the code for macro invocations
 pub(crate) struct MacroInvocation<'a, 'b> {
@@ -97,14 +95,14 @@ impl<'a, 'b> MacroInvocation<'a, 'b> {
         buf: &'b mut Buffer,
         generator: &mut Generator<'a, 'h>,
     ) -> Result<(), CompileError> {
-        let mut named_arguments: HashMap<&str, _, FxBuildHasher> = HashMap::default();
+        let mut named_arguments = HashMap::default();
         if let Some(Expr::NamedArgument(_, _)) = self.call_args.last().map(|expr| &***expr) {
             // First we check that all named arguments actually exist in the called item.
             for (index, arg) in self.call_args.iter().enumerate().rev() {
-                let Expr::NamedArgument(arg_name, _) = &***arg else {
+                let &Expr::NamedArgument(arg_name, _) = &***arg else {
                     break;
                 };
-                if !self.macro_def.args.iter().any(|(arg, _)| arg == arg_name) {
+                if !self.macro_def.args.iter().any(|&(arg, _)| arg == arg_name) {
                     return Err(self.callsite_ctx.generate_error(
                         format_args!(
                             "no argument named `{arg_name}` in macro {}",
diff --git a/askama_derive/src/generator/node.rs b/askama_derive/src/generator/node.rs
index d0f57d33..cf78ac1a 100644
--- a/askama_derive/src/generator/node.rs
+++ b/askama_derive/src/generator/node.rs
@@ -1,5 +1,5 @@
 use std::borrow::Cow;
-use std::collections::hash_map::{Entry, HashMap};
+use std::collections::hash_map::Entry;
 use std::fmt::Debug;
 use std::mem;
 use std::ops::ControlFlow;
@@ -12,13 +12,14 @@ use parser::node::{
 use parser::{Expr, Node, Span, Target, WithSpan};
 use proc_macro2::TokenStream;
 use quote::quote_spanned;
+use rustc_hash::FxBuildHasher;
 use syn::Token;
 
 use super::{DisplayWrap, Generator, LocalMeta, MapChain, compile_time_escape, is_copyable};
 use crate::generator::{LocalCallerMeta, Writable, helpers, logic_op};
 use crate::heritage::{Context, Heritage};
 use crate::integration::{Buffer, string_escape};
-use crate::{CompileError, FileInfo, field_new, fmt_left, fmt_right, quote_into};
+use crate::{CompileError, FileInfo, HashMap, field_new, fmt_left, fmt_right, quote_into};
 
 impl<'a> Generator<'a, '_> {
     pub(super) fn impl_template_inner(
@@ -1270,7 +1271,8 @@ impl<'a> Generator<'a, '_> {
 
         let mut targets = Buffer::new();
         let mut lines = Buffer::new();
-        let mut expr_cache = HashMap::with_capacity(self.buf_writable.len());
+        let mut expr_cache =
+            HashMap::with_capacity_and_hasher(self.buf_writable.len(), FxBuildHasher);
         // the `last_line` contains any sequence of trailing simple `writer.write_str()` calls
         let mut trailing_simple_lines = Vec::new();
 
diff --git a/askama_derive/src/heritage.rs b/askama_derive/src/heritage.rs
index b489eb14..d98efac9 100644
--- a/askama_derive/src/heritage.rs
+++ b/askama_derive/src/heritage.rs
@@ -1,15 +1,13 @@
 use core::fmt;
-use std::collections::HashMap;
 use std::path::Path;
 use std::sync::Arc;
 
 use parser::node::{BlockDef, Macro};
 use parser::{Node, Parsed, Span};
-use rustc_hash::FxBuildHasher;
 
 use crate::config::Config;
 use crate::input::LiteralOrSpan;
-use crate::{CompileError, FileInfo};
+use crate::{CompileError, FileInfo, HashMap};
 
 pub(crate) struct Heritage<'a, 'h> {
     pub(crate) root: &'h Context<'a>,
@@ -19,7 +17,7 @@ pub(crate) struct Heritage<'a, 'h> {
 impl<'a, 'h> Heritage<'a, 'h> {
     pub(crate) fn new(
         mut root: &'h Context<'a>,
-        contexts: &'a HashMap<&'a Arc<Path>, Context<'a>, FxBuildHasher>,
+        contexts: &'a HashMap<&'a Arc<Path>, Context<'a>>,
     ) -> Self {
         let mut blocks: BlockAncestry<'a, 'h> = root
             .blocks
@@ -38,16 +36,15 @@ impl<'a, 'h> Heritage<'a, 'h> {
     }
 }
 
-type BlockAncestry<'a, 'h> =
-    HashMap<&'a str, Vec<(&'h Context<'a>, &'a BlockDef<'a>)>, FxBuildHasher>;
+type BlockAncestry<'a, 'h> = HashMap<&'a str, Vec<(&'h Context<'a>, &'a BlockDef<'a>)>>;
 
 #[derive(Clone)]
 pub(crate) struct Context<'a> {
     pub(crate) nodes: &'a [Box<Node<'a>>],
     pub(crate) extends: Option<Arc<Path>>,
-    pub(crate) blocks: HashMap<&'a str, &'a BlockDef<'a>, FxBuildHasher>,
-    pub(crate) macros: HashMap<&'a str, &'a Macro<'a>, FxBuildHasher>,
-    pub(crate) imports: HashMap<&'a str, Arc<Path>, FxBuildHasher>,
+    pub(crate) blocks: HashMap<&'a str, &'a BlockDef<'a>>,
+    pub(crate) macros: HashMap<&'a str, &'a Macro<'a>>,
+    pub(crate) imports: HashMap<&'a str, Arc<Path>>,
     pub(crate) path: Option<&'a Path>,
     pub(crate) parsed: &'a Parsed,
     pub(crate) literal: Option<LiteralOrSpan>,
diff --git a/askama_derive/src/input.rs b/askama_derive/src/input.rs
index d7e0de03..01c0a1e8 100644
--- a/askama_derive/src/input.rs
+++ b/askama_derive/src/input.rs
@@ -1,5 +1,4 @@
 use std::borrow::Cow;
-use std::collections::HashMap;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 use std::sync::Arc;
@@ -7,13 +6,12 @@ use std::sync::Arc;
 use parser::node::Whitespace;
 use parser::{Node, Parsed};
 use proc_macro2::Span;
-use rustc_hash::FxBuildHasher;
 use syn::punctuated::Punctuated;
 use syn::spanned::Spanned;
 use syn::{Attribute, Expr, ExprLit, ExprPath, Ident, Lit, LitBool, LitStr, Meta, Token};
 
 use crate::config::{Config, SyntaxAndCache};
-use crate::{CompileError, FileInfo, MsgValidEscapers};
+use crate::{CompileError, FileInfo, HashMap, MsgValidEscapers};
 
 #[derive(Clone, Debug)]
 pub(crate) enum LiteralOrSpan {
@@ -178,7 +176,7 @@ impl TemplateInput<'_> {
 
     pub(crate) fn find_used_templates(
         &self,
-        map: &mut HashMap<Arc<Path>, Arc<Parsed>, FxBuildHasher>,
+        map: &mut HashMap<Arc<Path>, Arc<Parsed>>,
     ) -> Result<(), CompileError> {
         let (source, source_path) = match &self.source {
             Source::Source(s) => (s.clone(), None),
diff --git a/askama_derive/src/lib.rs b/askama_derive/src/lib.rs
index ecef3cb7..d110633e 100644
--- a/askama_derive/src/lib.rs
+++ b/askama_derive/src/lib.rs
@@ -23,7 +23,7 @@ pub mod __macro_support {
 }
 
 use std::borrow::{Borrow, Cow};
-use std::collections::hash_map::{Entry, HashMap};
+use std::collections::hash_map::Entry;
 use std::fmt;
 use std::hash::{BuildHasher, Hash};
 use std::path::Path;
@@ -623,7 +623,7 @@ fn var_expr_n(n: usize, span: proc_macro2::Span) -> Ident {
 }
 
 #[derive(Debug)]
-struct OnceMap<K, V>([Mutex<HashMap<K, V, FxBuildHasher>>; 8]);
+struct OnceMap<K, V>([Mutex<HashMap<K, V>>; 8]);
 
 impl<K, V> Default for OnceMap<K, V> {
     fn default() -> Self {
@@ -718,3 +718,5 @@ macro_rules! quote_into {
 }
 
 pub(crate) use {fmt_left, fmt_right, quote_into};
+
+type HashMap<K, V> = std::collections::hash_map::HashMap<K, V, FxBuildHasher>;
diff --git a/askama_parser/Cargo.toml b/askama_parser/Cargo.toml
index 22046480..11476fec 100644
--- a/askama_parser/Cargo.toml
+++ b/askama_parser/Cargo.toml
@@ -21,6 +21,7 @@ name = "from_str"
 harness = false
 
 [dependencies]
+rustc-hash = "2.0.0"
 serde = { version = "1.0", optional = true }
 serde_derive = { version = "1.0", optional = true }
 unicode-ident = "1.0.12"
diff --git a/askama_parser/src/expr.rs b/askama_parser/src/expr.rs
index af799ae7..4cda0958 100644
--- a/askama_parser/src/expr.rs
+++ b/askama_parser/src/expr.rs
@@ -1,4 +1,3 @@
-use std::collections::HashSet;
 use std::str;
 
 use winnow::Parser;
@@ -11,9 +10,9 @@ use winnow::token::{one_of, take_until};
 
 use crate::node::CondTest;
 use crate::{
-    CharLit, ErrorContext, Level, Num, ParseResult, PathOrIdentifier, StrLit, StrPrefix, WithSpan,
-    can_be_variable_name, char_lit, cut_error, filter, identifier, keyword, not_suffix_with_hash,
-    num_lit, path_or_identifier, skip_ws0, skip_ws1, str_lit, ws,
+    CharLit, ErrorContext, HashSet, Level, Num, ParseResult, PathOrIdentifier, StrLit, StrPrefix,
+    WithSpan, can_be_variable_name, char_lit, cut_error, filter, identifier, keyword,
+    not_suffix_with_hash, num_lit, path_or_identifier, skip_ws0, skip_ws1, str_lit, ws,
 };
 
 macro_rules! expr_prec_layer {
@@ -253,7 +252,7 @@ impl<'a> Expr<'a> {
         level: Level<'_>,
     ) -> ParseResult<'a, Vec<WithSpan<'a, Box<Self>>>> {
         let _level_guard = level.nest(i)?;
-        let mut named_arguments = HashSet::new();
+        let mut named_arguments = HashSet::default();
         let start = *i;
 
         preceded(
diff --git a/askama_parser/src/lib.rs b/askama_parser/src/lib.rs
index 4732495f..0a2b3511 100644
--- a/askama_parser/src/lib.rs
+++ b/askama_parser/src/lib.rs
@@ -18,6 +18,7 @@ use std::path::Path;
 use std::sync::Arc;
 use std::{fmt, str};
 
+use rustc_hash::FxBuildHasher;
 use winnow::ascii::take_escaped;
 use winnow::combinator::{
     alt, cut_err, delimited, empty, fail, not, opt, peek, preceded, repeat, terminated,
@@ -1463,6 +1464,8 @@ fn cut_context_err<'a, T>(gen_err: impl FnOnce() -> ErrorContext<'a>) -> ParseRe
     Err(ErrMode::Cut(gen_err()))
 }
 
+type HashSet<T> = std::collections::hash_set::HashSet<T, FxBuildHasher>;
+
 #[cfg(not(windows))]
 #[cfg(test)]
 mod test {
diff --git a/askama_parser/src/node.rs b/askama_parser/src/node.rs
index fcdd7ef2..5a304be3 100644
--- a/askama_parser/src/node.rs
+++ b/askama_parser/src/node.rs
@@ -1,4 +1,3 @@
-use std::collections::HashSet;
 use std::str::{self, FromStr};
 
 use winnow::combinator::{
@@ -11,8 +10,8 @@ use winnow::token::{any, rest, take_until};
 use winnow::{ModalParser, Parser};
 
 use crate::{
-    ErrorContext, Expr, Filter, ParseResult, Span, State, Target, WithSpan, cut_error, filter,
-    identifier, is_rust_keyword, keyword, skip_ws0, str_lit_without_prefix, ws,
+    ErrorContext, Expr, Filter, HashSet, ParseResult, Span, State, Target, WithSpan, cut_error,
+    filter, identifier, is_rust_keyword, keyword, skip_ws0, str_lit_without_prefix, ws,
 };
 
 #[derive(Debug, PartialEq)]
@@ -685,7 +684,7 @@ impl<'a> Macro<'a> {
         }
 
         if let Some(ref params) = params {
-            let mut names = HashSet::new();
+            let mut names = HashSet::default();
 
             let mut iter = params.iter();
             while let Some((arg_name, default_value)) = iter.next() {