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Screen optimizations#160

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Commits on Jun 17, 2022

• Upgrade pyperf (drop support for Python 2.x)

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• Allow change the screen geometry

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• Impl benchmark tests for screen.display, .reset and .resize

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Commits on Jun 18, 2022

• Impl script to run a full benchmark

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Commits on Jul 2, 2022

• Fix benchmark.py using ByteStream and not Stream

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Commits on Jul 4, 2022

• Enable optionally tracemalloc on full benchmark

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• display meth: iterate over data entries filling the gap between

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• Inline generator into display inner loop

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• Move assert out of prod code

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• Cache in Char its width

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• Pre-fetch attributes on screen.draw (x1.20 to x2.0 faster)

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• Allow temporal cursor_x > columns (x1.05 to x1.14 faster)

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• Make Char mutable (not a namedtuple) (API may break)

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• Refactor Char's style in a separated namedtuple object.

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• Reuse/share char styles (x1.05 to x1.30 lighter)

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• Update Chars in-place instead of recreating them (x1.20 and x1.90 faster; regress on mem)

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• Fix test_reverse_index (history) due old API

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• Use binary search over non-empty lines on index/reverse_index

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• Minor optimizations.

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Commits on Jul 5, 2022

• Calculate statistics about buffer's and lines' internals (no stable API)

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• On screen.buffer return a read-only view (BufferView/LineView)

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• Minor lookup prefetch.

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• Do not unintentionally create empty lines

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Commits on Jul 6, 2022

• Add blankcs Stats

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• Use a space for padding screen.display

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• Replace line's default style instead overwriting its char

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• Fix a bug on index that top line was not removed.

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• BufferView not longer add new lines on iteration.

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Commits on Jul 7, 2022

• Try to delete entries on erase instead of write spaces

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Commits on Jul 8, 2022

• Impl prev_page/next_page with sparse iteration

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• Make lines in history a LineView and make Line raise on non-key

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• Test sparsity on index and reverse_index

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• Test sparsity of insert_lines/delete_lines (fix bug on delete_lines)

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• Test sparsity on insert_characters/delete_characters/erase_characters

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• Impl repr of a Char

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• Extend erase_* meth tests for sparsity and cursor attr usage (fixed a bug)

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• Make erase_in_display conformant (test with non-default cursor attrs)

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• Sparse iteration of insert_characters and delete_characters

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• Add more checks to tests; fix bug on after_event and make it sparse-aware

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Commits on Jul 9, 2022

• Impl sparse iteration for insert_lines/delete_lines; fix insert_characters

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• Sparse iter for erase_characters/erase_in_line

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• Impl resize with sparse iter

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• Optional use a dummy set for tracking dirty lines

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• Binary search for the tabstop

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• Make (0, lines-1) the default margin instead of None

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• Make internal _buffer a dict and not a defaultdict

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• Optionally disable display graphic attributes

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• Replace explicit for-loops with map calls

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Commits on Jul 10, 2022

• Pass track_dirty_lines and disable_display_graphic to HistoryScreen

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• Document what are and how to interpret the LineStats and BufferStats

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• Fuzzy tests *_characters and *_lines methods

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• Improve the docs (plus minor fixes on Line and BufferView)

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• Impl compressed_display to optionally avoid left/right spaces, top/bottom empty lines

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Commits on Jul 12, 2022

• Optimize the insert/delete characters/lines with map-loops

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