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[EM] Treat ellpack as dense matrix when there's no compression. #10870

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[EM] Treat ellpack as dense matrix when there's no compression. #10870

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Commits on Oct 1, 2024

  1. Work on compressing sparse data. 

    Compression info.

Row stride.

Add test.

cleanup.

Add tests.

name.

Cleanup.

comment.

used n_symbols.

cleanup.

Histogram.

Split up tests.

Write compressed.

Comment.

from ghist.

Work on ellpack -> ghist.

look into adapter case.

from data.

cleanup.

start working on tests.

check.

From adapter.

to ghist.

dense.

empty.

feature groups.

feature group.

histogram.

rename.

CPU.

cleanup.

Enable get cut.

Fix test.
    @trivialfis
    trivialfis committed Oct 1, 2024
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  2. Avoid over compression for now. 

    cleanup.

Fix.

test.

fix.
    @trivialfis
    trivialfis committed Oct 1, 2024
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