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  #1  
Old 24.05.2018, 21:04
avada avada is offline
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Default Mega.co.nz decrypting extremely slow. Is it normal?

Hi!

Decrypting files downloaded from mega is obscenely slow. For example right now a 2.6GB file is being decrypted and it goes with 0.01-0.06 percent increments. It's ridiculous.
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  #2  
Old 24.05.2018, 22:39
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Jiaz Jiaz is offline
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What are your system specs? HDD/SDD or network drive? What os?
That's slow indeed but decryption happens as fast as possible so only limited by read/write speed and cpu.
What is CPU usage during decryption?
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Old 25.05.2018, 01:49
avada avada is offline
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Quote:
Originally Posted by Jiaz View Post
What are your system specs? HDD/SDD or network drive? What os?
That's slow indeed but decryption happens as fast as possible so only limited by read/write speed and cpu.
What is CPU usage during decryption?
CPU usage is minimal. I guess the decryption process is inefficient when it comes to disk writes (I download on an HDD).
Otherwise I'm on win8.1 and have rather modern r5 1600 CPU
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Old 25.05.2018, 16:09
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Sounds to as something causes issues. Speed should be limited by disk/cpu and not that slow. There is nothing *inefficient*. Decryption is read data, decrypt , write data.
How long does the file take? What firewall/av do you use?
I can offer you a teamviewer session so we check this out together, just contact us via support@jdownloader.org
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  #5  
Old 26.06.2018, 23:16
plaintext plaintext is offline
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Why is the download not decrypted in RAM as it downloads?
Afaik the download is encrypted in chunks, which you could decrypt as the download happens. This way nothing has to be read from disk again and thus, slowed down.
All of mega's tools do this, i think. Would it be possible to implement that in the plugin?
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Old 27.06.2018, 11:42
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Jiaz Jiaz is offline
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We are aware of this idea
but it requires major changes to the download system and the old/current one is too hackish to implement it. Same reason why is not done yet.
I'm working on a new download system but unfortunately I don't find much time to finish the work at the moment.
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Old 27.06.2018, 11:43
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But even without this optimizations, the decryption speed is primary limited by read/write speed and even on hdd it should not be *that* slow like from OP. That's why I've asked for teamviewer session in first place
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