diff --git a/compiler/src/compile.rs b/compiler/src/compile.rs
index 39f550d0e..24df923b7 100644
--- a/compiler/src/compile.rs
+++ b/compiler/src/compile.rs
@@ -1083,9 +1083,7 @@ impl<O: OutputStream> Compiler<O> {
         // Doc string value:
         self.emit(Instruction::LoadConst {
             value: match doc_str {
-                Some(doc) => bytecode::Constant::String {
-                    value: doc.to_string(),
-                },
+                Some(doc) => bytecode::Constant::String { value: doc },
                 None => bytecode::Constant::None, // set docstring None if not declared
             },
         });
@@ -2199,7 +2197,7 @@ fn get_doc(body: &[ast::Statement]) -> (&[ast::Statement], Option<String>) {
         if let ast::StatementType::Expression { ref expression } = val.node {
             if let ast::ExpressionType::String { value } = &expression.node {
                 if let Some(value) = try_get_constant_string(value) {
-                    return (body_rest, Some(value.to_string()));
+                    return (body_rest, Some(value));
                 }
             }
         }
diff --git a/derive/src/compile_bytecode.rs b/derive/src/compile_bytecode.rs
index a14589caf..b1c1c9cbe 100644
--- a/derive/src/compile_bytecode.rs
+++ b/derive/src/compile_bytecode.rs
@@ -66,7 +66,7 @@ impl CompilationSource {
                 })?;
                 hashmap! {
                     module_name.clone() => FrozenModule {
-                        code: self.compile_string(&source, mode, module_name.clone())?,
+                        code: self.compile_string(&source, mode, module_name)?,
                         package: false,
                     },
                 }
@@ -74,7 +74,7 @@ impl CompilationSource {
             CompilationSourceKind::SourceCode(code) => {
                 hashmap! {
                     module_name.clone() => FrozenModule {
-                        code: self.compile_string(code, mode, module_name.clone())?,
+                        code: self.compile_string(code, mode, module_name)?,
                         package: false,
                     },
                 }
diff --git a/parser/src/function.rs b/parser/src/function.rs
index f60689786..de6529d8a 100644
--- a/parser/src/function.rs
+++ b/parser/src/function.rs
@@ -20,7 +20,7 @@ pub fn parse_params(params: Vec<ParameterDef>) -> Result<ParameterDefs, LexicalE
                 // have defaults
                 return Err(LexicalError {
                     error: LexicalErrorType::DefaultArgumentError,
-                    location: name.location.clone(),
+                    location: name.location,
                 });
             }
         }
@@ -44,7 +44,7 @@ pub fn parse_args(func_args: Vec<FunctionArgument>) -> Result<ast::ArgumentList,
                     if keyword_names.contains(&keyword_name) {
                         return Err(LexicalError {
                             error: LexicalErrorType::DuplicateKeywordArgumentError,
-                            location: value.location.clone(),
+                            location: value.location,
                         });
                     }
 
@@ -58,7 +58,7 @@ pub fn parse_args(func_args: Vec<FunctionArgument>) -> Result<ast::ArgumentList,
                 if !keywords.is_empty() && !is_starred(&value) {
                     return Err(LexicalError {
                         error: LexicalErrorType::PositionalArgumentError,
-                        location: value.location.clone(),
+                        location: value.location,
                     });
                 }
 
diff --git a/parser/src/lexer.rs b/parser/src/lexer.rs
index 96e924079..507190ba1 100644
--- a/parser/src/lexer.rs
+++ b/parser/src/lexer.rs
@@ -33,26 +33,28 @@ impl IndentationLevel {
         // We only know for sure that we're smaller or bigger if tabs
         // and spaces both differ in the same direction. Otherwise we're
         // dependent on the size of tabs.
-        if self.tabs < other.tabs {
-            if self.spaces <= other.spaces {
-                Ok(Ordering::Less)
-            } else {
-                Err(LexicalError {
-                    location,
-                    error: LexicalErrorType::TabError,
-                })
+        match self.tabs.cmp(&other.tabs) {
+            Ordering::Less => {
+                if self.spaces <= other.spaces {
+                    Ok(Ordering::Less)
+                } else {
+                    Err(LexicalError {
+                        location,
+                        error: LexicalErrorType::TabError,
+                    })
+                }
             }
-        } else if self.tabs > other.tabs {
-            if self.spaces >= other.spaces {
-                Ok(Ordering::Greater)
-            } else {
-                Err(LexicalError {
-                    location,
-                    error: LexicalErrorType::TabError,
-                })
+            Ordering::Greater => {
+                if self.spaces >= other.spaces {
+                    Ok(Ordering::Greater)
+                } else {
+                    Err(LexicalError {
+                        location,
+                        error: LexicalErrorType::TabError,
+                    })
+                }
             }
-        } else {
-            Ok(self.spaces.cmp(&other.spaces))
+            Ordering::Equal => Ok(self.spaces.cmp(&other.spaces)),
         }
     }
 }
diff --git a/vm/src/builtins.rs b/vm/src/builtins.rs
index e33a3bd8b..3ff72416e 100644
--- a/vm/src/builtins.rs
+++ b/vm/src/builtins.rs
@@ -396,13 +396,13 @@ fn builtin_locals(vm: &VirtualMachine) -> PyDictRef {
 }
 
 fn builtin_max(vm: &VirtualMachine, args: PyFuncArgs) -> PyResult {
-    let candidates = if args.args.len() > 1 {
-        args.args.clone()
-    } else if args.args.len() == 1 {
-        vm.extract_elements(&args.args[0])?
-    } else {
-        // zero arguments means type error:
-        return Err(vm.new_type_error("Expected 1 or more arguments".to_string()));
+    let candidates = match args.args.len().cmp(&1) {
+        std::cmp::Ordering::Greater => args.args.clone(),
+        std::cmp::Ordering::Equal => vm.extract_elements(&args.args[0])?,
+        std::cmp::Ordering::Less => {
+            // zero arguments means type error:
+            return Err(vm.new_type_error("Expected 1 or more arguments".to_string()));
+        }
     };
 
     if candidates.is_empty() {
@@ -442,13 +442,13 @@ fn builtin_max(vm: &VirtualMachine, args: PyFuncArgs) -> PyResult {
 }
 
 fn builtin_min(vm: &VirtualMachine, args: PyFuncArgs) -> PyResult {
-    let candidates = if args.args.len() > 1 {
-        args.args.clone()
-    } else if args.args.len() == 1 {
-        vm.extract_elements(&args.args[0])?
-    } else {
-        // zero arguments means type error:
-        return Err(vm.new_type_error("Expected 1 or more arguments".to_string()));
+    let candidates = match args.args.len().cmp(&1) {
+        std::cmp::Ordering::Greater => args.args.clone(),
+        std::cmp::Ordering::Equal => vm.extract_elements(&args.args[0])?,
+        std::cmp::Ordering::Less => {
+            // zero arguments means type error:
+            return Err(vm.new_type_error("Expected 1 or more arguments".to_string()));
+        }
     };
 
     if candidates.is_empty() {
diff --git a/vm/src/cformat.rs b/vm/src/cformat.rs
index e816562d3..7b1b07120 100644
--- a/vm/src/cformat.rs
+++ b/vm/src/cformat.rs
@@ -379,11 +379,7 @@ fn parse_literal(text: &str) -> Result<(CFormatPart, &str, usize), ParsingError>
             }
             Err(err) => {
                 if !result_string.is_empty() {
-                    return Ok((
-                        CFormatPart::Literal(result_string.to_string()),
-                        cur_text,
-                        consumed,
-                    ));
+                    return Ok((CFormatPart::Literal(result_string), cur_text, consumed));
                 } else {
                     return Err((err, consumed));
                 }
@@ -391,7 +387,7 @@ fn parse_literal(text: &str) -> Result<(CFormatPart, &str, usize), ParsingError>
         }
     }
     Ok((
-        CFormatPart::Literal(result_string.to_string()),
+        CFormatPart::Literal(result_string),
         "",
         text.chars().count(),
     ))
diff --git a/vm/src/format.rs b/vm/src/format.rs
index 6180dd3e9..ff4cad783 100644
--- a/vm/src/format.rs
+++ b/vm/src/format.rs
@@ -500,7 +500,7 @@ impl FormatString {
                 }
                 Err(err) => {
                     if !result_string.is_empty() {
-                        return Ok((FormatPart::Literal(result_string.to_string()), cur_text));
+                        return Ok((FormatPart::Literal(result_string), cur_text));
                     } else {
                         return Err(err);
                     }
diff --git a/vm/src/frame.rs b/vm/src/frame.rs
index 02c669d33..307f93cc5 100644
--- a/vm/src/frame.rs
+++ b/vm/src/frame.rs
@@ -736,7 +736,7 @@ impl Frame {
                 BlockType::Finally { handler } => {
                     self.pop_block();
                     self.push_block(BlockType::FinallyHandler {
-                        reason: Some(reason.clone()),
+                        reason: Some(reason),
                     });
                     self.jump(handler);
                     return Ok(None);
diff --git a/vm/src/obj/objbyteinner.rs b/vm/src/obj/objbyteinner.rs
index 24768e464..d4748d985 100644
--- a/vm/src/obj/objbyteinner.rs
+++ b/vm/src/obj/objbyteinner.rs
@@ -260,7 +260,7 @@ impl ByteInnerSplitOptions {
             -1
         };
 
-        Ok((sep.clone(), maxsplit))
+        Ok((sep, maxsplit))
     }
 }
 
diff --git a/vm/src/obj/objenumerate.rs b/vm/src/obj/objenumerate.rs
index 481bbb60e..29617b7df 100644
--- a/vm/src/obj/objenumerate.rs
+++ b/vm/src/obj/objenumerate.rs
@@ -41,7 +41,7 @@ impl PyEnumerate {
 
         let iterator = objiter::get_iter(vm, &iterable)?;
         PyEnumerate {
-            counter: RefCell::new(counter.clone()),
+            counter: RefCell::new(counter),
             iterator,
         }
         .into_ref_with_type(vm, cls)
diff --git a/vm/src/obj/objfunction.rs b/vm/src/obj/objfunction.rs
index e780fc316..d1e1cb3f9 100644
--- a/vm/src/obj/objfunction.rs
+++ b/vm/src/obj/objfunction.rs
@@ -85,7 +85,7 @@ impl PyMethod {
     }
 
     fn getattribute(&self, name: PyStringRef, vm: &VirtualMachine) -> PyResult {
-        vm.get_attribute(self.function.clone(), name.clone())
+        vm.get_attribute(self.function.clone(), name)
     }
 }
 
diff --git a/vm/src/obj/objmap.rs b/vm/src/obj/objmap.rs
index 7da6d181d..fde6b95cc 100644
--- a/vm/src/obj/objmap.rs
+++ b/vm/src/obj/objmap.rs
@@ -39,7 +39,7 @@ impl PyMap {
             mapper: function.clone(),
             iterators,
         }
-        .into_ref_with_type(vm, cls.clone())
+        .into_ref_with_type(vm, cls)
     }
 
     #[pymethod(name = "__next__")]
diff --git a/vm/src/obj/objobject.rs b/vm/src/obj/objobject.rs
index 2a5a0afef..3b899893d 100644
--- a/vm/src/obj/objobject.rs
+++ b/vm/src/obj/objobject.rs
@@ -134,7 +134,7 @@ pub fn object_dir(obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<PyList> {
         )?;
     }
 
-    let attributes: Vec<_> = dict.into_iter().map(|(k, _v)| k.clone()).collect();
+    let attributes: Vec<_> = dict.into_iter().map(|(k, _v)| k).collect();
 
     Ok(PyList::from(attributes))
 }
diff --git a/vm/src/obj/objrange.rs b/vm/src/obj/objrange.rs
index 4cfa3aec4..b35b1701f 100644
--- a/vm/src/obj/objrange.rs
+++ b/vm/src/obj/objrange.rs
@@ -133,7 +133,7 @@ impl PyRange {
     fn new(cls: PyClassRef, stop: PyIntRef, vm: &VirtualMachine) -> PyResult<PyRangeRef> {
         PyRange {
             start: PyInt::new(BigInt::zero()).into_ref(vm),
-            stop: stop.clone(),
+            stop,
             step: PyInt::new(BigInt::one()).into_ref(vm),
         }
         .into_ref_with_type(vm, cls)
diff --git a/vm/src/obj/objslice.rs b/vm/src/obj/objslice.rs
index cdbea2e68..ae839248f 100644
--- a/vm/src/obj/objslice.rs
+++ b/vm/src/obj/objslice.rs
@@ -221,11 +221,7 @@ impl PySlice {
         // Calculate Stop
         let mut stop: BigInt;
         if vm.is_none(&self.stop(vm)) {
-            stop = if backwards {
-                lower.clone()
-            } else {
-                upper.clone()
-            };
+            stop = if backwards { lower } else { upper };
         } else {
             let this_stop: PyRef<PyInt> = self.stop(vm).try_into_ref(vm)?;
             stop = this_stop.as_bigint().clone();
@@ -234,10 +230,10 @@ impl PySlice {
                 // From end of array
                 stop += length;
                 if stop < lower {
-                    stop = lower.clone();
+                    stop = lower;
                 }
             } else if stop > upper {
-                stop = upper.clone();
+                stop = upper;
             }
         }
 
diff --git a/vm/src/obj/objsuper.rs b/vm/src/obj/objsuper.rs
index 0768c7b53..157ff1032 100644
--- a/vm/src/obj/objsuper.rs
+++ b/vm/src/obj/objsuper.rs
@@ -85,7 +85,7 @@ impl PySuper {
     ) -> PyResult<PySuperRef> {
         // Get the type:
         let py_type = if let OptionalArg::Present(ty) = py_type {
-            ty.clone()
+            ty
         } else {
             match vm.current_scope().load_cell(vm, "__class__") {
                 Some(obj) => PyClassRef::try_from_object(vm, obj)?,
diff --git a/vm/src/obj/objtype.rs b/vm/src/obj/objtype.rs
index a3f781284..696279b91 100644
--- a/vm/src/obj/objtype.rs
+++ b/vm/src/obj/objtype.rs
@@ -323,7 +323,7 @@ fn type_new_slot(metatype: PyClassRef, args: PyFuncArgs, vm: &VirtualMachine) ->
 
     let attributes = dict.to_attributes();
 
-    let mut winner = metatype.clone();
+    let mut winner = metatype;
     for base in &bases {
         let base_type = base.class();
         if issubclass(&winner, &base_type) {
diff --git a/vm/src/stdlib/dis.rs b/vm/src/stdlib/dis.rs
index 8302ef919..5814b229b 100644
--- a/vm/src/stdlib/dis.rs
+++ b/vm/src/stdlib/dis.rs
@@ -23,7 +23,7 @@ fn dis_compiler_flag_names(vm: &VirtualMachine) -> PyObjectRef {
     for (name, flag) in CodeFlags::NAME_MAPPING {
         dict.set_item(
             &vm.ctx.new_int(flag.bits()),
-            vm.ctx.new_str(name.to_string()),
+            vm.ctx.new_str((*name).to_string()),
             vm,
         )
         .unwrap();
diff --git a/vm/src/vm.rs b/vm/src/vm.rs
index de48e3d46..ea045f858 100644
--- a/vm/src/vm.rs
+++ b/vm/src/vm.rs
@@ -450,7 +450,7 @@ impl VirtualMachine {
     }
 
     pub fn get_locals(&self) -> PyDictRef {
-        self.current_scope().get_locals().clone()
+        self.current_scope().get_locals()
     }
 
     pub fn context(&self) -> &PyContext {