VRTComplexSource: fix excessive RAM usage with many sources (fixes #8967, 3.8.0 regression) #8969
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…Geo#8967, 3.8.0 regression) m_abyWrkBuffer and m_abyWrkBufferMask were mistakenly put at the VRTComplexSource level, missing that there can be a big number of sources whose lifetime is the same as the VRT dataset, and thus it is inappropriate to have long-lived working buffers at that level. We can actually use one single instance of them for all sources, so move that at the dataset level.
This was referenced Dec 16, 2023
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(fixes #8967, 3.8.0 regression)
m_abyWrkBuffer and m_abyWrkBufferMask were mistakenly put at the VRTComplexSource level, missing that there can be a big number of sources whose lifetime is the same as the VRT dataset, and thus it is inappropriate to have long-lived working buffers at that level. We can actually use one single instance of them for all sources, so move that at the dataset level.