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# Copyright (C) 2006 by Canonical Ltd
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# Copyright (C) 2006 Canonical Ltd
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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 version 2 as published by
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# the Free Software Foundation.
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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 2 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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from bzrlib.transform import TreeTransform
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from bzrlib.workingtree import WorkingTree
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class LinesDone(Exception):
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"""Raised when `LineConsumer` reaches the required number of lines."""
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class LineConsumer(object):
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"""Count lines that are produced.
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When the required number of lines have been reached, raise `LinesDone`.
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def __init__(self, required_lines):
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"""Create a new consumer.
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:param required_lines: How many lines must be produced.
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:type required_lines: integer
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self.required_lines = required_lines
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def write(self, text):
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"""Write some text to the black hole.
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But count how many lines have been written.
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:param text: A string that would be written.
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:raise LinesDone: when the required number of lines has been reached.
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self.required_lines -= text.count('\n')
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if self.required_lines < 0:
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class LogBenchmark(Benchmark):
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"""Benchmarks for ``'bzr log'`` performance."""
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def test_log(self):
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"""Run log in a many-commit tree."""
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"""Run log in a many-commit tree."""
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tree = self.make_many_commit_tree(hardlink=True)
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lf = log_formatter('long', to_file=StringIO())
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self.time(show_log, tree.branch, lf, direction='reverse')
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bzrlib/benchmarks/bench_log.py
