Table 5
Mean time spent in the “source loop” by the “full” and “limited memory” versions of the ’data-space’ algorithm.
“Source loop” duration (s) | Total | |||||||
Iteration | 20 | 50 | 125 | 250 | 500 | 1000 | 1183 | time(s) |
|
||||||||
Full | 6 | 18 | 50 | 107 | 288 | 1701 | 2748 | 1 432 864 |
“Limited” | 8 | 18 | 20 | 20 | 30 | 107 | 100 | 98 746 |
Notes.The characteristics of the dataset related to GX 339-4 are detailed in Table 3. The “source loop” was parallelized on 8 threads of a 64 processors (2.62 GHz) machine. The “limited” version was parameterized as follows: n0 = min (n −30 exposures, n – two change points backward), where n is the current exposure, individually obtained for each source as explained in Sect. 5.4.
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