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54 lines
1.4 KiB
EmacsLisp
54 lines
1.4 KiB
EmacsLisp
;;; appendage.el --- Benchmarks of list appendage -*- lexical-binding: t; -*-
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;; Copyright (C) 2023 Free Software Foundation, Inc
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;; Author: Hugo Thunnissen <devel@hugot.nl>
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;; Keywords: benchmark
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(message "20000 appendages using nconc")
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(garbage-collect)
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(benchmark
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1 '(let (list)
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(dotimes (i 20000)
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(setq list (nconc list (list i))))
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list))
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(message "20000 appendages using push + nreverse")
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(garbage-collect)
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(benchmark
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1 '(let (list)
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(dotimes (i 20000)
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(push i list))
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(nreverse list)))
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(message "20000 appendages using rear pointer")
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(garbage-collect)
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(benchmark
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1 '(let* ((list (cons nil nil))
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(rear list))
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(dotimes (i 20000)
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(setq rear (setcdr rear (cons i nil))))
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(cdr list)))
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