BCJ2 filter was improved for better compression ratio. Some bugs were fixed. 21.07: Some minor changes and fixes. 21.06: The bug in LZMA encoding function was fixed. 21.03 beta: LZMA dicrionary up to 4 GB. 21.02 alpha: macOS and Linux support. 19.00: Encryption strength for 7z archives was increased. 18.06: Some speed optimiztions in LZMA/LZMA2 code. 18.05: Some speed optimiztions in LZMA/LZMA2 code. 18.01: Some changes in LZMA2/xz multithreading code for compressing. Some bugs were fixed. 9.35: AES code and SFXs modules were included to SDK. 9.20: New small SFX module for installers. 9.04: LZMA2 and XZ support. 4.62: LZMA SDK is placed in the public domain. LZMA / LZMA2 are default and general compression methods of 7z format in the 7-Zip program provides a high compression ratio and fast decompression, so it is very suitable for embedded applications. For example, it can be used for ROM (firmware) compressing. Compression speed: 2-8 MB/s on 4 GHz CPU using two cpu threads. Decompression speed on single cpu thread: — 30-100 MB/s on modern 4 GHz CPU (Intel, AMD, ARM). 5-15 MB/s on simple 1 GHz RISC CPU (ARM, MIPS, PowerPC). The LZMA decoder uses only CPU integer instructions and can be implemented for any modern 32-bit CPU. LZMA SDK is placed in the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute the original LZMA SDK code, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means. Note: The abbreviation LZMA originally stood for Lempel — Ziv — Markov chain — Arithmetic coding. Preliminary versions of LZMA used arithmetic coding. But in the final version of LZMA, arithmetic coding was replaced by range coding.
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最近Win10迎来了一次重大更新，代号Creator创意者。 手持Surface的我马上进行了升级，经过漫长等待之后终于升级完成。 先汇报一下，系统正常使用暂时没发现什么问题。 升级过后，微软新发布的3D绘图软件Paint 3D就已经集成在系统中啦！ 迅速把玩了两天，把这两天的体验感受和功能使用做一期【野动画】！ 整个界面还是比较友好的，没有复杂的按钮和参数，上手较容易（当然也与功能少有关系）。
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秉承野动画一贯的“不手把手教”原则，我们不会对每个按钮是什么都描述一遍，因为大部分只要自己试一试就明白了。 顶部几个板块包括绘画、三维、贴纸、文字等；右边是具体的工具、颜色、参数等调节。 主界面是一块白板，仔细看的话，它是处在一个三维空间中的，这也是这个软件的特色，形象来说就是在空间中绘画。 绘画功能比较常见，就是右侧不同笔和不同颜色的组合。
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唯一不同是，色板上方还有材质选择功能（虽然只有少数几种金属材质），不同材质会影响三维打灯的渲染效果。 绘画的平面图，可以转成三维空间中的一张画，任意旋转推拉，或者作为三维模型里的贴图。 好了，重点功能在三维绘画，在三维板块中，已经有一些预设模型了，包括人物动物和基础形状，另外就是“3D涂鸦”（命名也狠接地气呀，跟那些学霸型三维软件不同）。 涂鸦功能是绘画出形状之后会自动生成三维物体（但具体的形状参数貌似是调不了的），这个物体就已经存在与空间之中，可以自由旋转和移动。
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