Why they use utility matrix SINGLETONS in LineImpl and CounterImpl?

[paco]

Good afternoon,
i am studying jacoco source code, and i would like to understand why they use a matrix of org.jacoco.core.internal.analysis.CounterImpl (2 dimenssion) or org.jacoco.core.internal.analysis.LineImpl (4 dimenssion) ? and why they limit matrix size with SINGLETON_LIMIT = 30 in CounterImpl;  SINGLETON_INS_LIMIT = 8 and  SINGLETON_BRA_LIMIT = 4 in LineImpl?
thankx

[bjk...@gmail.com]

The idea is to share memory for commonly used values. There is no real significance to the actual array sizes; they were chosen to share a reasonable number of instances without consuming too much memory (for example, see the commit message of https://github.com/jacoco/jacoco/commit/3e5b0801b79e94cba9317f18e507d5e65737ce2c). I suspect the values could be changed if you had interesting data points.

[paco]

Le mardi 7 février 2017 14:53:28 UTC, bjk...@gmail.com a écrit :

The idea is to share memory for commonly used values.  There is no real significance to the actual array sizes; they were chosen to share a reasonable number of instances without consuming too much memory (for example, see the commit message of https://github.com/jacoco/jacoco/commit/3e5b0801b79e94cba9317f18e507d5e65737ce2c).  I suspect the values could be changed if you had interesting data points.

Thank a lot for your answer, i looked for the reason during many hours