PIK is a modernized variant of JPEG with similar goals: efficient storage and delivery of photos and web images. It is designed from the ground up for high quality and fast decoding. Features enabling high quality (perceptually lossless): built-in support for psychovisual modeling via adaptive quantization and XYB color space powerful coding tools: 4x4..32x32 DCT, AC/DC predictors, chroma from lum
Inside Capacitor, BigQuery’s next-generation columnar storage format The “BigQuery under the hood” blog post gave an overview of different BigQuery subsystems. Today, we'll take a deeper dive into one of them — the storage system. We'll follow data as it's loaded into a BigQuery table.BigQuery supports several input formats — CSV, JSON, Datastore backups, AVRO — and w
Snappy is a compression/decompression library. It does not aim for maximum compression, or compatibility with any other compression library; instead, it aims for very high speeds and reasonable compression. For instance, compared to the fastest mode of zlib, Snappy is an order of magnitude faster for most inputs, but the resulting compressed files are anywhere from 20% to 100% bigger. On a single
Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression. The basic function to compress data is ZopfliCompress in zopfli.h. Use the ZopfliOptions object to set parameters that affect the speed and compression. Use the ZopfliInitOptions function to place the default values in the ZopfliOptions first. ZopfliCompress supports d
open-vcdiff is an encoder and decoder for the VCDIFF format, as described in RFC 3284: The VCDIFF Generic Differencing and Compression Data Format. You will need to first synchronize gflags and gtest by running git submodule update --init --recursive. Or if you have system installed gflags and/or gtest libraries you can provide -Dvcdiff_use_system_gflags=ON and -Dvcdiff_use_system_gtest=ON for cma
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