Yeah, CoversationListActivity uses more memory than the selection list it seems. Without activity open:
```
 SQL
         MEMORY_USED:      342
  PAGECACHE_OVERFLOW:       86          MALLOC_SIZE:       62

 DATABASES
      pgsz     dbsz   Lookaside(b)          cache  Dbname
         4       16             26        12/29/3  /data/data/org.thoughtcrime.securesms/databases/canonical_address.db
         4      124            238         8/33/7  /data/data/org.thoughtcrime.securesms/databases/messages.db
         4       20             21         5/28/2  /data/data/org.thoughtcrime.securesms/databases/whisper_directory.db
```

with open:
```
 SQL
         MEMORY_USED:      424
  PAGECACHE_OVERFLOW:       92          MALLOC_SIZE:       62

 DATABASES
      pgsz     dbsz   Lookaside(b)          cache  Dbname
         4       16             26        12/26/3  /data/data/org.thoughtcrime.securesms/databases/canonical_address.db
         4      124            238         8/30/7  /data/data/org.thoughtcrime.securesms/databases/messages.db
         1        3             36        24/23/5  :memory:
         4       20             21         5/25/2  /data/data/org.thoughtcrime.securesms/databases/whisper_directory.db
```