注：以下数据均采用“最好”压缩得出。
一、使用winra工具对目标文件进行压缩，得出如下结果(winrar支持两种格式压缩)：
| 文件格式 | 压缩前大小（字节） | rar压缩后大小（字节） | zip压缩后大小（字节） | rar压缩率 | zip压缩率 |
| JPEG | 25,049,666 | 24,379,710 | 24,379,392 | 2.67% | 2.68% |
| BMP | 22,616,550 | 8,175,537 | 12,507,968 | 63.85% | 44.70% |
| MP3 | 30,154,228 | 29,931,105 | 29,897,355 | 0.74% | 0.85% |
| MP4 | 396,231,169 | 395,504,834 | 394,879,582 | 0.18% | 0.34% |
| AVI | 108,300,864 | 102,183,647 | 104,713,964 | 5.65% | 3.31% |
| RMVB | 449,221,835 | 447,904,871 | 447,630,744 | 0.29% | 0.35% |
| MKV | 564,619,749 | 564,222,464 | 563,811,162 | 0.07% | 0.14% |
| Word | 25,731,072 | 15,337,081 | 16,611,768 | 40.39% | 35.44% |
| Execl | 34,787,328 | 5,293,376 | 8,405,348 | 84.78% | 75.84% |
| txt | 26,655,349 | 12,380,134 | 14,032,890 | 53.55% | 53.55% |
见图表：
二、使用好压对目标进行压缩，得出结果如下：
| 文件格式 | 压缩前大小（字节） | 7z压缩后大小（字节） | zip压缩后大小（字节） | 7z压缩率 | zip压缩率 |
| JPEG | 25,049,666 | 24,465,063 | 24,392,549 | 2.33% | 2.62% |
| BMP | 22,616,550 | 10,038,519 | 12,506,942 | 55.61% | 44.70% |
| MP3 | 30,154,228 | 30,025,189 | 29,896,747 | 0.43% | 0.85% |
| MP4 | 396,231,169 | 394,879,532 | 399,346,666 | 0.34% | -0.79% |
| AVI | 108,300,864 | 101,627,786 | 104,713,842 | 6.16% | 3.31% |
| RMVB | 449,221,835 | 449,471,757 | 447,630,692 | -0.06% | 0.35% |
| MKV | 564,619,749 | 568,724,028 | 563,811,006 | -0.73% | 0.14% |
| Word | 25,731,072 | 14,975,597 | 16,604,056 | 41.80% | 35.47% |
| Execl | 34,787,328 | 3,413,170 | 8,403,420 | 90.19% | 75.84% |
| txt | 26,655,349 | 12,344,669 | 14,009,640 | 53.69% | 47.44% |
结果中有负数，说明文件压缩后比压缩前大了。
见图表：
三、使用360压缩后，结果如下：
| 文件格式 | 压缩前大小（字节） | rar压缩后大小（字节） | 7z压缩后大小（字节） | zip压缩后大小（字节） | rar压缩率 | 7z压缩率 | zip压缩率 |
| JPEG | 25,049,666 | 24,379,710 | 24,464,648 | 24,344,331 | 2.67% | 2.34% | 2.82% |
| BMP | 22,616,550 | 8,175,537 | 10,038,458 | 11,906,306 | 63.85% | 55.61% | 47.36% |
| MP3 | 30,154,228 | 30,154,846 | 30,025,142 | 29,878,227 | 0.00% | 0.43% | 0.92% |
| MP4 | 396,231,169 | 396,231,255 | 396,231,281 | 396,231,327 | 0.00% | 0.00% | 0.00% |
| AVI | 108,300,864 | 102,183,647 | 101,627,762 | 103,886,054 | 5.65% | 6.16% | 4.08% |
| RMVB | 449,221,835 | 449,221,924 | 449,471,733 | 449,221,995 | 0.00% | -0.06% | 0.00% |
| MKV | 564,619,749 | 564,222,464 | 564,619,915 | 564,619,987 | 0.07% | 0.00% | 0.00% |
| Word | 25,731,072 | 15,337,081 | 14,975,367 | 16,410,166 | 40.39% | 41.80% | 36.22% |
| Execl | 34,787,328 | 5,293,376 | 3,412,845 | 7,716,333 | 84.78% | 90.19% | 77.82% |
| txt | 26,655,349 | 12,380,134 | 12,344,090 | 13,584,158 | 53.55% | 53.69% | 53.55% |
见图表：
四、综合各工具最高压缩率的格式对比如下：
| 文件格式 | winrar压缩率 | 好压压缩率 | 360压缩率 |
| JPEG | 2.67% | 2.33% | 2.67% |
| BMP | 63.85% | 55.61% | 63.85% |
| MP3 | 0.74% | 0.43% | 0.00% |
| MP4 | 0.18% | 0.34% | 0.00% |
| AVI | 5.65% | 6.16% | 5.65% |
| RMVB | 0.29% | -0.06% | 0.00% |
| MKV | 0.07% | -0.73% | 0.07% |
| Word | 40.39% | 41.80% | 40.39% |
| Execl | 84.78% | 90.19% | 84.78% |
| txt | 53.55% | 53.69% | 53.55% |
通过上面的实测，对于大家平时选择什么压缩工具，使用什么格式压缩，可以起到一定的参考作用。
本文转自Y.weisheng 51CTO博客，原文链接：http://blog.51cto.com/yuan2/835692，如需转载请自行联系原作者
