Issue activity log
| 2008-02-28 10:18 | Created | Slow file transfers |
| Component | Core | |
| Severity | Enhancement | |
| Comment | Many users report WinSCP not to utilize all available bandwidth. This topic is discussed in FAQ: https://winscp.net/eng/docs/faq_slow |
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| 2008-02-28 10:26 | Comment | Related: Issue 1, Issue 17. Also WinSCP 4.1 will support (less secure) Arcfour cipher, which should be fast. |
| 2008-02-28 10:52 | Comment | 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 |
| 2009-03-02 08:22 | Comment | 4.2.1 almost twice as fast as 4.1.8 on Windows Vista: https://winscp.net/forum/viewtopic.php?t=6614 |
| 2009-07-03 08:13 | Comment | Suggestion for fixing network speed after installing SP2 for Vista: https://winscp.net/forum/viewtopic.php?p=24994#24994 |
| 2009-08-19 08:39 | Comment | Fixing network speed in WinXP: https://winscp.net/forum/viewtopic.php?p=25801#25801 |
| 2010-10-16 20:46 | Comment | It has been suggested by ultramage that increasing SSH socket buffer size may instead transfer speed. See Issue 615. |
| 2011-11-11 09:35 | Comment | Issue 615 has been rolled back by Issue 677 as some users were having problems with it. The fix was reintroduced by Issue 690, with option to disable it, in WinSCP 5.0.3. |
| 2016-05-17 09:33 | Comment | Issue 787: WinSCP 5.0.6: When Optimize connection buffer size is enabled, also FTP socket internal buffer size is increased. |
| Comment | Issue 1141: WinSCP 5.2.2: Increase local SSH send buffer to improve performance | |
| Comment | Issue 1273: WinSCP 5.7: Size of connection receiving buffer increased. | |
| 2016-05-17 09:34 | Comment | WinSCP 5.8: Improved transfer speed: – with SFTP and SCP protocols when CPU is limiting factor. – with SFTP on high latency connections Issue 1295 |
| Implemented in | 5.8 | |
| Resolution | FIXED | |
| Status | RESOLVED | |
| 2016-05-19 09:21 | Comment | 5.8.3: Dynamically increase TCP send buffer on fast connections. |
| 2018-01-11 09:09 | Comment | https://winscp.net/forum/viewtopic.php?t=25705 |
| 2019-06-14 09:13 | Comment | S3 specific entry: Issue 1732 |
| 2019-07-21 10:40 | Comment | Issue 1769: Hardware accelerated AES (AES-NI) |
| 2022-10-03 10:45 | Comment | WinSCP 4.2.1 almost twice as fast as WinSCP 4.1.8 on Windows Vista:· https://winscp.net/forum/viewtopic.php?t=6614 |
| Comment | WinSCP (FAR plugin 1.5.1 basebased 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· | |
| 2022-10-03 10:46 | Comment | Bug 615 has been rolled back by Bug 677 as some users were having problems with it.· The fix was reintroduced by Bug 690, with option to disable it, in WinSCP 5.0.3.· |
| Comment | Bug 787: WinSCP 5.0.6: When //Optimize connection buffer size// is enabled, also FTP socket internal buffer size is increased. | |
| Comment | Bug 1141: WinSCP 5.2.2: Increase local SSH send buffer to improve performance | |
| Comment | Bug 1273: WinSCP 5.7: Size of connection receiving buffer increased. | |
| Comment | WinSCP 5.8: Improved transfer speed:· -– with SFTP and SCP protocols when CPU is limiting factor.· -– with SFTP on high latency connections Bug 1295 | |
| Comment | WinSCP 5.8.3: Dynamically increase TCP send buffer on fast connections. | |
| 2022-10-03 10:47 | Comment | WinSCP (FAR plugin 1.5.1 based 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 |
| Comment | WinSCP (FAR plugin 1.5.1 based 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 | |
| Comment | WinSCP (FAR plugin 1.5.1 based 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 | |
| Comment | ReleatedReleted: Bug #1, Bug #17.· Also WinSCP 4.1 will support (less secure) Arcfour cipher, which should be fast. | |
| 2022-10-03 10:48 | Comment | WinSCP (FAR plugin 1.5.1 based 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?pt=141044366#14104 |
| Comment | Suggestion for fixing network speed after installing SP2 for Vista:· https://winscp.net/forum/viewtopic.php?pt=249946905#24994 | |
| Comment | Fixing network speed in WinXP:· https://winscp.net/forum/viewtopic.php?pt=258015277#25801 | |
| 2022-10-03 10:49 | Comment | Fixing network speed in WinXPWindows XP: https://winscp.net/forum/viewtopic.php?t=5277#25801 |
| Comment | ReletedRelated: Bug 1, Bug 17. Also WinSCP 4.1 will support (less secure) Arcfour cipher, which should be fast. | |
| 2022-10-03 10:50 | Comment | Many users report WinSCP not to utilize all available bandwidth.· ---- This topic is discussed in FAQ:· https://winscp.net/eng/docs/faq_slow |