Have had this happen on occasion. The solution that works for me usually is restarting the DL.....after restarting the browser/PC if just restarting the DL doesn't work.

(also stuff like that is why I don't automate such things and DL games manually in small batches...that way if something messes up not too much time/etc ends up being wasted)

I am guessing it depends on -Where- the various files are actually hosted. I have an *ahem* rather large library, and I download the offline installers for Windows and Mac. (I'm an AAA game dev, so I consider it my reference library)

On the majority of the Windows Installers, I usually get 45-52 MB/Sec. Some however only get 2-6 MB/Sec, often times at the same time I have a fast download going.

Mac Installer downloads usually are slow - 600Kb/sec to 8 MB/Sec.

Several months ago, almost all download were very fast. No so much today.

45-52 MB/s? Wow. That's blazing. I have a 100 Mb/s, so 12.5 MB/s. My speeds have varied between 12.5 MB/s and 2 or 3 MB/s. But I'll finish downloading tonight. After 16 hours it was just over half done, and it's a first that it took so long.

I was thinking more like his ISP having issues overall not targeting.

So you have downloaded 520 GB in 12 hours... Sorry I didn't calculate what your average speed there was, but isn't that quite speedy still? What kind of download speeds were you expecting?

As someone said, there can be so many reasons, even all at the same time, that could cause slowdowns.

For instance, if I download my GOG games (using gogrepoc.py) on my Raspberry Pi4 to an external USB hard drive (USB 3.0), I get at best something like 30-40 Mbit/s download speeds, when my internet connection is 400Mbit/s. The RPi4 is connected directly to my router with a LAN cable, so it is not about congested wifi either...

But then if I try the same download (to that same USB HDD) from my Windows 10 laptop, I seem to get considerably faster download speeds, like 200Mbit/s or maybe sometimes even more. I presume the slowdown on the Raspberry Pi4 is either due to its lower performance chip that is responsible for networking (or something like that), or then it is the fact that that USB HDD is formatted to NTFS, and the Linux running on RPi4 has extra slowdown when it is accessing a non-Linux native filesystem like NTFS, even affecting high-speed downloads.

Then again it is also possible you just had some bad luck and you got connected to some GOG download server that just... happens to be slow to you, at least at that point of time.

Anyway, I don't complain as long as I am getting download speeds of several dozen Mbit/s, even if it would be nicer that it was around 200-400Mbit/s all the time...

Yeah these "wifi inside your home" problems are like black magic... Sometimes works fine and sometimes like shit. Sometimes I feel like it depends what my neighbor downstairs is doing with his wifi (the same room just below this bedroom), maybe he is watching online pr0n, in fact I am pretty sure he is, and then my wifi connection is shit just so that he can jerk off... Our wifi signals interfering each other etc.

...and then there were the cases when I felt that switching on our TV in the living room made the wifi connection shit, possibly due to the wireless (bluetooth?) subwoofer that is connected to the TV's audio system. This was confirmed by the wifi being fine if I merely switched off the audio system, and switched it on again. Maybe the subwoofer then selected some less congested wireless channel or whatever...

Earlier I had my wifi router set to select the channel automatically, in which case it is supposed to select some less congested channel. Still wifi was quite often shit. I then changed it so that I manually selected certain channel that appeared to be less congested (the router itself gives a rough estimation how congested different channels appear to be, and I also checked with phone apps like "WiFi Analyzer" which is a pretty good application to see the wifi situation at your home...).

Then of course you have to take account which generation of wifi you are using, which frequency (2.4GHz vs 5GHz). My older laptops can do 2.4GHz only anyway, and of course those channels tend to be more congested overall anyway (both by other wireless devices in my household, and also those close neighbours), but then as far as I understand, 5GHz ie. higher frequencies might have extra problems when they have to travel longer distances and go through walls (shorter wavelengths attenuate faster with distance and obstacles... right?), so maybe 2.4GHz is still preferred for PCs and other devices which are further away from your wifi router...

I just checked right now with the wifi analyzer at my home, and with the 2.4GHz frequency, it appears the least congested channels are 8, 13 and 14. I have currently set my wifi router manually to use 13, so I guess I should stay there or maybe even move it to 14 which nobody nearby seems to be using.

No, I should have done about 500GB in 12 hours. I only did 200GB.

Ah ok.

So 200GB in 12 hours means... around 38 megabits/sec on the average, if I counted right. And you should have had on the average something like 95Mbits/s?

Yeah... at least you are not getting those 1Mbit/s or even much slower download speeds that some have been reporting, but then in their case I presume it may be something at their end, like their software firewall or security suite slowing down downloads or even their ISP throttling it for reasons unknown. As said, I am content, but not happy, getting that kind of (30-40Mbit/s) download speeds from e.g. GOG.com, if I could have close to 10x download speeds in ideal conditions. Then again as said in my case it may be related things caused by my setup (Raspberry Pi4 Linux downloading to a NTFS USB HDD...).

If it is not just a congested download server on GOG's end but it is either GOG or your ISP throttling the download if they see you've kept downloading so much data already in one swoop. I am unsure how different ISPs do it, maybe they favor known content delivery sources like Netflix, Steam, Sony, Microsoft (XBox) etc... but then when they see someone downloading from GOG.com, they are like "GOG.com? Sounds fishy, downloading so much with http(s)... probably a kiddie pr0n site, better to throttle it a bit."

Well ok maybe that theory is quite wrong as well as I presume GOG uses some big-name content delivery networks (ie. not their own download servers) to deliver the games to customers, or how it goes. It is always nice to speculate though.

Then again, it should also be something in the tool, gogrepo, as well. How it handles several simultaneous download threads etc... but then I presume it should happen everytime and from the start on the same system.

Or then it is all those damn gogrepo users like me, who are stressing the download servers and making them congested! Damn us! (I haven't run gogrepo for a couple of months now I think, maybe it would be time to refresh my GOG game archive...).

I would love to use that python script on a regular basis but I don't think there is an ability to limit the download speed in it. I only have 25d 5u and when I try to download ALL of my stuff It makes my Internet almost useless for everyone until I stop it. I have pfSense as my firewall but don't know how to use it to limit bandwidth per client. I know it is under Firewall/Traffic Shaper but every time I did it I would break stuff. Oh well.

Noise, humidity, etc. There's alot of things that can influence signal noise, and powerline can fail for a number of reasons especially tied to your neighbors' habits, including neighbors at the other side of the town/city which can cause major fluctuations of power all over the grid. To know what's going on for you, specifically, i'd need information on your appartment that you probably don't have, yourself.

I haven't looked into it, but i'm relatively sure you could find some way at the OS level or something to limit it.

I downloaded Spore about a week ago at 4 gigs-per-hour, which is the best I've ever had.

Slow downloading from GOG for me, when it happens, can usually be put down to one or more root causes.

1. Friday late afternoon until the wee hours Saturday morning, involves congestion locally for me. This happens as regular as clockwork, and I attribute to schoolies, weeklies and bottlenecks.

2. The PC at my ISP that I am connected to having too many connections etc. Nearly always solved by disconnecting and then reconnecting a few minutes later ... presumably to a different ISP PC.

3. Toward the end of a GOG sale, where so many are now busy downloading their purchases. Could be deliberate throttling by GOG too.

4. Suspected GOG server issues ... perhaps offline due to maintenance etc, and so the load shared by other servers further afield, which might incur some congestion and bottlenecks etc.

5. Something else ... congestion or bottleneck somewhere and or maybe some re-routing.

Two or more of the above can apply at the same time, but not often in my experience ... that I've noticed.