Compact the whole level if advantageous
Compact the whole level if advantageous

When L_i has more data than L_{i + 1} should have, compact the whole thing.

rescrv/HyperLevelDB,dyu-deploy/HyperLevelDB,influxdb/HyperLevelDB,yonglehou/HyperLevelDB,tempbottle/HyperLevelDB,tempbottle/HyperLevelDB,dyu-deploy/HyperLevelDB,norton/HyperLevelDB,influxdb/HyperLevelDB,norton/HyperLevelDB,rescrv/HyperLevelDB,yonglehou/HyperLevelDB