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Table 4

Wall-clock timings of several operations on test set D (65 GB) on a server with a 40-core Intel Xeon CPU E5-2660 @ 2.20 GHz and 4 × 3TB RAID disks.

Reading the uncompressed set 277 s
Copying the uncompressed set 679 s
Compress visibilities with 8-bit/AF-normalization 387 s
Compress visibilities with 2-bit/AF-normalization 356 s
Compress visibilities with 8-bit/RF-normalization 374 s
Compress visibilities with 2-bit/RF-normalization 351 s
Compress visibilities with 8-bit/row normalization 378 s
Compress visibilities with 2-bit/row normalization 332 s
Compress weights to 12 bits 285 s
Imaging of uncompressed set 339 s
Imaging of 8-bit compressed set 236 s
Imaging of 2-bit compressed set 198 s

Notes. Values are averages of five runs.

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