- C-a == Ctrl-a
- M-a == Alt-a
:q close
:w write/saves
:wa[!] write/save all windows [force]
:wq write/save and close
#!/usr/bin/env python | |
# marc-w.com | |
# Built and tested on Django 1.5 | |
class BulkInsertManager(models.Manager): | |
def _bulk_insert_ignore(self, create_fields, values, print_sql=False): | |
''' | |
Bulk insert/ignore | |
@param create_fields : list, required, fields for the insert field declaration |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |