Reduce number of dynamic memory allocations

Dynamic memory allocation can take up a significant amount of time in the decoder. This reduction of dynamic memory allocation can speed up the decoder by more than 10% at low resolutions (class D).

Please refer to individual commits for more details

added 1 commit

• 8e16ada0 - Clean up: reduce memory reallocation in CodingStructure::createCoeffs

Compare with previous version

merged

mentioned in commit 423fabc2