comparision of redis memory optimization, for https://medium.com/@leshchuk/zipem-all-61076c7da4c

comparision

# Columns: 
# redis - clear memory usage of 100K values in Mb, 
# gz - gz compressed value, smaz = smaz compressed value, 
# key zip = zipping key crumbs to cingle char, 
# me_ - memory_efficient_ hash optimization

#integers, html pieces, plain english text pieces 
+----------+--------+--------+--------+---------+--------+----------+------------+
| type     | redis  | gz     | smaz   | key zip | me_*   | kz+me+gz | kz+me+smaz |
+----------+--------+--------+--------+---------+--------+----------+------------+
| ints     | 11.57  | 13.21  | 8.63   | 8.63    | 0.99   | 0.95     | 0.95       |
+----------+--------+--------+--------+---------+--------+----------+------------+
| html100  | 20.81  | 20.22  | 19.8   | 17.76   | 10.72  | 9.38     | 9.15       |
| html500  | 59.55  | 40.44  | 54.11  | 56.52   | 48.87  | 28.91    | 41.48      |
| html1000 | 107.78 | 59.29  | 97.5   | 104.72  | 97.66  | 45.77    | 81.52      |
| html4000 | 398.3  | 154.17 | 361.69 | 395.25  | 395.99 | 133.29   | 332.83     |
+----------+--------+--------+--------+---------+--------+----------+------------+
| txt100   | 20.8   | 20.38  | 17.44  | 17.75   | 10.72  | 10.56    | 7.62       |
| txt500   | 58.95  | 41.94  | 42.02  | 55.93   | 48.83  | 30.51    | 30.51      |
| txt1000  | 107.78 | 70.99  | 72.36  | 104.76  | 97.66  | 53.4     | 58.04      |
| txt4000  | 400.75 | 202.4  | 254.26 | 397.69  | 383.01 | 175.47   | 228.9      |
+----------+--------+--------+--------+---------+--------+----------+------------+

# Active record object serialization
+----------+-------+--------------+-------------------+------------------------+
| type     | redis | to_json + gz | to_json + me + gz | me + custom_compressor |
+----------+-------+--------------+-------------------+------------------------+
| ext_tags | 45.0  | 33.78        | 22.82             | 16.66                  |
| users    | 52.0  | 38.12        | 25.93             | 16.78                  |
+----------+-------+--------------+-------------------+------------------------+