A squashed backmerge of 3 commits authored by Thomas Faber.
They do help to speed up RosBE2.1.6 within ReactOS.
'configure' runs faster by ~ factor 5.
'ninja bootcd -j1' runs faster by ~ factor 2.
I considered back-porting that a necessity because we
considerably lost speed over the last years in those scenarios.
I tested, and it works well also in the 0.4.14RC.
0.4.15-dev-309-g
10d23614d3
Use LastEntryInSegment to speed up RtlpFindAndCommitPages. CORE-14588
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0.4.15-dev-307-g
1b7a4b3ebf
Add and populate LastEntryInSegment. CORE-14588
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0.4.15-dev-306-g
78dddd125c
Create a define for the common members of HEAP and HEAP_SEGMENT. CORE-14588
The code relies on these members matching up, so it's confusing for them
to be duplicated.
