Tracker »
Bug 164 – Slow file transfers
:
Core
:
Unspecified
:
Enhancement
:
Medium
:
0
WinSCP (FAR plugin 1.5.1 base on WinSCP 3.8.2) is as fast as PSCP (8 MB/s) and SFTP (3 MB/s) (PuTTY 0.60):
https://winscp.net/forum/viewtopic.php?t=3137
WinSCP 3.8.2 is as fast on upload as SSH Secure Shell 3.2.9, but much slower on download on WinXP. On Win2K it is as fast:
https://winscp.net/forum/viewtopic.php?t=4684
Transfer rate is capped at 100KBps:
https://winscp.net/forum/viewtopic.php?t=5277
https://winscp.net/forum/viewtopic.php?t=5313
SCP significantly faster than SFTP:
https://winscp.net/forum/viewtopic.php?t=5096
https://winscp.net/forum/viewtopic.php?t=2455
PuTTY 0.59 much faster than 0.58:
https://winscp.net/forum/viewtopic.php?p=14104#14104
https://winscp.net/forum/viewtopic.php?t=3137
WinSCP 3.8.2 is as fast on upload as SSH Secure Shell 3.2.9, but much slower on download on WinXP. On Win2K it is as fast:
https://winscp.net/forum/viewtopic.php?t=4684
Transfer rate is capped at 100KBps:
https://winscp.net/forum/viewtopic.php?t=5277
https://winscp.net/forum/viewtopic.php?t=5313
SCP significantly faster than SFTP:
https://winscp.net/forum/viewtopic.php?t=5096
https://winscp.net/forum/viewtopic.php?t=2455
PuTTY 0.59 much faster than 0.58:
https://winscp.net/forum/viewtopic.php?p=14104#14104
4.2.1 almost twice as fast as 4.1.8 on Windows Vista:
https://winscp.net/forum/viewtopic.php?t=6614
https://winscp.net/forum/viewtopic.php?t=6614
Suggestion for fixing network speed after installing SP2 for Vista:
https://winscp.net/forum/viewtopic.php?p=24994#24994
https://winscp.net/forum/viewtopic.php?p=24994#24994
Fixing network speed in WinXP:
https://winscp.net/forum/viewtopic.php?p=25801#25801
https://winscp.net/forum/viewtopic.php?p=25801#25801
It has been suggested by ultramage that increasing SSH socket buffer size may instead transfer speed. See Bug 615.
Bug 787: 5.0.6: When Optimize connection buffer size is enabled, also FTP socket internal buffer size is increased.
Bug 1141: 5.2.2: Increase local SSH send buffer to improve performance
Bug 1273: 5.7: Size of connection receiving buffer increased.
5.8: Improved transfer speed:
- with SFTP and SCP protocols when CPU is limiting factor.
- with SFTP on high latency connections Bug 1295
- with SFTP and SCP protocols when CPU is limiting factor.
- with SFTP on high latency connections Bug 1295
5.8.3: Dynamically increase TCP send buffer on fast connections.
S3 specific entry: Bug 1732
Bug 1769: Hardware accelerated AES (AES-NI)
This topic is discussed in FAQ:
https://winscp.net/eng/docs/faq_slow