`swiftlint --fix` is much slower than `swiftlint` even if there is nothing to fix

New Issue Checklist

• I've Updated SwiftLint to the latest version.
• I've searched for existing GitHub issues.

Bug Description

swiftlint --fix is much slower than swiftlint even if there is nothing to fix

~/.local/share/mise/shims/swiftlint --fix --quiet -> 29.125s
~/.local/share/mise/shims/swiftlint --strict --quiet -> 6.235S

Environment

• SwiftLint version (run swiftlint version to be sure) 0.59.1
• Xcode version (run xcodebuild -version to be sure) Xcode 16.4 Build version 16F6
• Installation method used (Homebrew, CocoaPods, building from source, etc) mise
• Configuration file:

# insert yaml contents here
# https://realm.github.io/SwiftLint/rule-directory.html

disabled_rules:
  - block_based_kvo
  - nsobject_prefer_isequal
  - cyclomatic_complexity
  - file_length
  - force_cast
  - force_try
  - function_parameter_count
  - function_body_length
  - large_tuple
  - line_length
  - type_body_length
  - vertical_parameter_alignment
  - class_delegate_protocol
  - closure_parameter_position
  - compiler_protocol_init
  - identifier_name
  - inclusive_language
  - multiple_closures_with_trailing_closure
  - notification_center_detachment
  - operator_whitespace
  - redundant_string_enum_value
  - sorted_imports
  - shorthand_operator
  - todo
  - trailing_comma
  - type_name
  - xctfail_message

opt_in_rules:
  - collection_alignment
  - comma_inheritance
  - contains_over_filter_count
  - contains_over_filter_is_empty
  - contains_over_first_not_nil
  - convenience_type
  - closure_spacing
  - direct_return
  - file_header
  - first_where
  - flatmap_over_map_reduce
  - implicit_return
  - last_where
  - literal_expression_end_indentation
  - local_doc_comment
  - multiline_parameters
  - overridden_super_call
  - operator_usage_whitespace
  - prohibited_super_call
  - prefer_self_type_over_type_of_self
  - redundant_nil_coalescing
  - redundant_type_annotation
  - return_value_from_void_function
  - self_binding
  - shorthand_optional_binding
  - sorted_first_last
  - sorted_imports
  - unneeded_parentheses_in_closure_argument
  - vertical_whitespace_closing_braces

nesting:
  type_level:
    warning: 3
  function_level:
    warning: 1
  ignore_typealiases_and_associatedtypes: true

file_header:
  severity: warning
  forbidden_pattern: //\n//.+\.swift

excluded:
  - .idea
  - .build
  - .maestro
  - .winston
  - Tuist/.build
  - '**/Derived/**/*.swift'
  - ios-libs-monorepo
  - Modules/Shared/IconShared/Shared/Icon.generated.swift
  - XcodeTemplates

Are you using nested configurations? If so, paste their
relative paths and respective contents.
No

Reproduce the reported comparison between swiftlint --fix --quiet - and swiftlint --strict --quiet - using SwiftLint 0.59.1, Xcode 16.4, and the supplied configuration. Trace the two command paths to determine why --fix performs extra work when no violations need fixing, then verify that the fix-mode runtime is comparable when the input requires no changes.