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Dict ROLZ 2 byte context experiment #974

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Dict ROLZ 2 byte context experiment #974

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klauspost
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Testing on go source files:

8912 files, 51253563 -> 15870944 (30.97%) - 3970.22 bytes saved/file

--->> (ROLZ after COPY&LIT)

8912 files, 51253563 -> 15840596 (30.91%) - 3973.63 bytes saved/file

Nothing too crazy here, but better than 1 byte.

```
BEFORE:

8912 files, 51253563 -> 15870944 (30.97%) - 3970.22 bytes saved/file

ROLZ after LIT:

8912 files, 51253563 -> 15866609 (30.96%) - 3970.71 bytes saved/file

ROLZ after LIT+COPY

8912 files, 51253563 -> 15861266 (30.95%) - 3971.31 bytes saved/file

```
Testing on go source files:

```
8912 files, 51253563 -> 15870944 (30.97%) - 3970.22 bytes saved/file

--->> (ROLZ after COPY&LIT)

8912 files, 51253563 -> 15840596 (30.91%) - 3973.63 bytes saved/file
```

Nothing too crazy here, but better than 1 byte.
@klauspost
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(with short repeats -> 8912 files, 51253563 -> 15838167 (30.90%) - 3973.90 bytes saved/file)

@klauspost
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Short repeat + reverse indexing: 8912 files, 51253563 -> 15822101 (30.87%) - 3975.70 bytes saved/file

@klauspost klauspost closed this Jul 26, 2024
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