From b6c87797721fcdfd9b8ed87d993e16ca87138044 Mon Sep 17 00:00:00 2001
From: Massimiliano Culpo <massimiliano.culpo@gmail.com>
Date: Tue, 7 Jun 2022 17:51:16 +0200
Subject: Use __slots__ for fast attribute access during parsing
---
lib/spack/spack/parse.py | 6 ++++++
lib/spack/spack/spec.py | 2 ++
2 files changed, 8 insertions(+)
(limited to 'lib')
diff --git a/lib/spack/spack/parse.py b/lib/spack/spack/parse.py
index 941cb5a93e..91cebe9063 100644
--- a/lib/spack/spack/parse.py
+++ b/lib/spack/spack/parse.py
@@ -17,6 +17,8 @@ import spack.util.path as sp
class Token(object):
"""Represents tokens; generated from input by lexer and fed to parse()."""
+ __slots__ = 'type', 'value', 'start', 'end'
+
def __init__(self, type, value="", start=0, end=0):
self.type = type
self.value = value
@@ -39,6 +41,8 @@ class Token(object):
class Lexer(object):
"""Base class for Lexers that keep track of line numbers."""
+ __slots__ = 'scanner0', 'scanner1', 'mode', 'mode_switches_01', 'mode_switches_10'
+
def __init__(self, lexicon0, mode_switches_01=[], lexicon1=[], mode_switches_10=[]):
self.scanner0 = re.Scanner(lexicon0)
self.mode_switches_01 = mode_switches_01
@@ -89,6 +93,8 @@ class Lexer(object):
class Parser(object):
"""Base class for simple recursive descent parsers."""
+ __slots__ = 'tokens', 'token', 'next', 'lexer', 'text'
+
def __init__(self, lexer):
self.tokens = iter([]) # iterators over tokens, handled in order.
self.token = Token(None) # last accepted token
diff --git a/lib/spack/spack/spec.py b/lib/spack/spack/spec.py
index d1ee8a4325..a325670289 100644
--- a/lib/spack/spack/spec.py
+++ b/lib/spack/spack/spec.py
@@ -4983,6 +4983,8 @@ _lexer = SpecLexer()
class SpecParser(spack.parse.Parser):
"""Parses specs."""
+ __slots__ = 'previous', '_initial'
+
def __init__(self, initial_spec=None):
"""Construct a new SpecParser.
--
cgit v1.2.3-70-g09d2