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Finishing touches

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Added FastOptions as an alternative to DefaultOptions
A few performance improvements
A few bug fixes
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Caleb Gardner
2023-12-27 21:35:40 -06:00
parent d9132ab6a4
commit 17d45eea50
9 changed files with 310 additions and 63 deletions
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README.md
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@@ -11,18 +11,27 @@ Currently has support for reading squashfs files and extracting files and folder
Special thanks to <https://dr-emann.github.io/squashfs/> for some VERY important information in an easy to understand format.
Thanks also to [distri's squashfs library](https://github.com/distr1/distri/tree/master/internal/squashfs) as I referenced it to figure some things out (and double check others).
## FUSE
As of `v1.0`, FUSE capabilities has been moved to [a separate library](https://github.com/CalebQ42/squashfuse).
## Limitations
* No Xattr parsing. This is simply because I haven't done any research on it and how to apply these in a pure go way.
* No Xattr parsing.
* Socket files are not extracted.
* From my research, it seems like a socket file would be useless if it could be created. They are still exposed when fuse mounted.
* From my research, it seems like a socket file would be useless if it could be created.
* Fifo files are ignored on `darwin`
## Issues
* Significantly slower then `unsquashfs` when extracting folders (about 5 ~ 7 times slower on a ~100MB archive using zstd compression)
* Significantly slower then `unsquashfs` when extracting folders
* This seems to be related to above along with the general optimization of `unsquashfs` and it's compression libraries.
* The larger the file's tree, the slower the extraction will be. Arch Linux's Live USB's airootfs.sfs takes ~35x longer for a full extraction.
* Times seem to be largely dependent on file tree size and compression type.
* My main testing image (~100MB) using Zstd takes about 6x longer.
* An Arch Linux airootfs image (~780MB) using XZ compression with LZMA filters takes about 32x longer.
* A Tensorflow docker image (~3.3GB) using Zstd takes about 12x longer.
Note: These numbers are using `FastOptions()`. `DefaultOptions()` takes about 2x longer.
## Recommendations on Usage