Skip to content

Latest commit

 

History

History
47 lines (35 loc) · 2.91 KB

paragon_performance.md

File metadata and controls

47 lines (35 loc) · 2.91 KB

Paragon database performance

ACL Plugin v0.4.0 ACL Plugin v0.3.0 UE v4.22.2
Compressed size 234.76 MB 234.76 MB 380.37 MB
Compression ratio 18.22 : 1 18.22 : 1 11.24 : 1
Compression time 23m 58.76s 30m 14.69s 2h 5m 11.22s
Compression speed 3043.42 KB/sec 2412.94 KB/sec 582.96 KB/sec
Max ACL error 0.8623 cm 0.8623 cm 0.8619 cm
Max UE4 error 0.8601 cm 0.8601 cm 0.6424 cm
ACL Error 99th percentile 0.0100 cm 0.0094 cm 0.0438 cm
Samples below ACL error threshold 99.00 % 99.19 % 81.75 %

ACL was smaller for 6343 clips (96.72 %)
ACL was more accurate for 5081 clips (77.48 %)
ACL has faster compression for 6514 clips (99.33 %)
ACL was smaller, better, and faster for 4911 clips (74.89 %)

Would the ACL Plugin have been included in the Automatic Compression permutations tried, it would have won for 6181 clips (94.25 %)

Data and method used

To compile these statistics, a large number of animations from Paragon are used. In October 2017 the animations were manually extracted and converted to the ACL file format losslessly. The data is sadly NOT available upon request. Epic has permitted Nicholas Frechette to use them for research purposes only under a non-disclosure agreement.

Note: Epic has since released Paragon assets publicly in early 2018, once I get around to it, it will be extracted along with updated stats.

  • Number of clips: 6558
  • Total duration: 7h 00m 45.27s
  • Raw size: 4276.11 MB (10x float32 * num bones * num samples)

The data set contains among other things:

  • Lots of characters with varying number of bones
  • Animated objects of various shape and form
  • Very short and very long clips
  • Clips with unusual sample rate (as low as 2 FPS!)
  • World space clips
  • Lots of 3D scale
  • Lots of other exotic clips

To measure and extract the compression statistics, the provided commandlet is used along with a python script to parse the results.

The ACL Plugin uses the default settings with an error threshold of 0.01cm while UE4 uses the Automatic Compression with an error threshold (master tolerance) of 0.1 cm. Both error thresholds used are suitable for production use. The 99th percentile and the number of samples below the ACL error threshold are calculated by measuring the error with ACL on every bone at every sample.

ACL and UE4 both use separate methods to measure the error and both values are shown for transparency.