Why is [] faster than list()?

Because [] and {} are literal syntax. Python can create bytecode just to create the list or dictionary objects: >>> import dis >>> dis.dis(compile('[]', '', 'eval')) 1 0 BUILD_LIST 0 3 RETURN_VALUE >>> dis.dis(compile('{}', '', 'eval')) 1 0 BUILD_MAP 0 3 RETURN_VALUE list() and dict() are separate objects. Their names need to be resolved, the stack has to be involved to push the arguments, the fra

[satosssi]

へー

[heavenshell]

[] が list() より速い理由