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Performance comparisons » History » Version 19

Greg Burri, 06/03/2012 04:30 AM

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h1. Performance comparisons
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h2. D-LAN vs ApexDC++
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We measured the transfer time and the number of CPU cycles for *one* transfer at a time of a *3.2 GiB file*. This is a particular case, the performance of both systems may varies in a concurrent downloading and uploading case.
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h3. Setup
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* We used two computers on a gigabit LAN.
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* There is a local DC++ hub: ADCH++ 2.8.0.
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* We didn't do any other operations during a transfer.
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* We download/upload only one file at the same time. We cleared queued and file before each measurement (the file is deleted from the trash).
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* OS: Windows 7 64bits
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* Download computer CPU: Intel Core 2 Duo E8400, 4 GiB of RAM
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* Upload computer CPU: Intel Core i7 860, 6 GiB of RAM
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* Apex version: v1.5.2.1276 (64bits)
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* D-LAN version: 1.1.0 Beta6
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* Software used to count cycles: "Process Hacker 2":http://processhacker.sourceforge.net/
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h3. Download speed
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We repeated the transfer three times.
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|  |_. # 1 |_. # 2 |_. # 3 |_. Average |_. Average download speed |
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|_. ApexDC++ | 160 s | 167 s | 163 s | 163.3 s | _20.1 MiB/s_ |
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|_. D-LAN | 78 s | 87 s | 86 s | 83.7 s | _39.2 MiB/s_ |
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h3. CPU Cycles
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These values are measured in one download/upload of a 3.2 GiB file.
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| [Million of cycles] |_. Download |_. Upload |_. Total |
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|_. ApexDC++ | 199'613 | 272'655 | _472'268_ |
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|_. D-LAN (Core + GUI) |  103'914 (88'800 + 15'114) | 24'086 (20'969 + 3'117) | _128'000_ |
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h2. D-LAN vs DC++ - Downloading a lot of tiny files
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We measure the time to transfert a directory containing a lot of tiny files. The size of the directory is 2.74 GiB and contains 3918 directories and 4684 files. Actually this is the directory of the game "League Of Legends":http://euw.leagueoflegends.com/.
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h3. Setup
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* We used two computers on a gigabit LAN.
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* There is a local DC++ hub: ADCH++ 2.8.1.
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* We didn't do any other operations during a transfer.
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* We did only one transfer at the same time. We cleared queued and the directory before each measurement (the files are deleted from the trash).
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* Both output directories are located on the same hard drive.
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* OS: Windows 7 64bits
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* Download computer CPU: Intel Core i7 860, 6 GiB of RAM
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* Upload computer CPU: Intel Core 2 Duo E8400, 4 GiB of RAM
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* DC++ version: 0.799 with download completed notifications disable
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* D-LAN version: 1.1.0 Beta8
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h3. Download time
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|  |_. # 1 |_. # 2 |_. Average |_. Factor |
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|_. DC++ | 9min 39s | 9min 46 | 9min 43s | 7.2 |
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|_. D-LAN | 1min 20s | 1min 22s | 1min 21s  | 1 |
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It seems DC++ has some troubles when there is a lot of little file to transfer.