Hi David, perhaps you made the same mistake I made, forgetting to actually install the new version.
As for VIRTUALADDRESSLIMIT, I even tried a new install of the latest beta, with the default of 1576 or whatever and Youtube worked once, mem /v reported close to 0 high and low shared memory (8 and 32 IIRC), changed VIRTUALADDRESSLIMIT and no more working YouTube.
Actually it seems the pattern is if I boot to a different install, it works once, which is weird, guess I should try a cold boot.
I do wonder about GCC optimizations, they have a habit of being buggy. The Moz apps are way more stable built with -686 and -O2. I note that the whole of Qt5 has -mno-avx and also linked with -Zno-fork. It's a shame it is so hard to build the whole thing to test.
As for the search, once I changed the wiki URL to
https://en.wikipedia.org/w/index.php?title=Special:Search&search= it works fine. Needs a way to edit the searches after finishing them.
I have to try Roberto's swap settings.
Also here's the CXXFLAGS Dooble Qt5 is built with,
g++ -c -Zomf -march=i686 -mno-avx -O3 -Wall -Warray-bounds=2 -Wcast-align -Wcast-qual -Wdouble-promotion -Werror -Wextra -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation=2 -Wformat=2 -Wlogical-op -Wno-deprecated-copy -Woverloaded-virtual -Wpointer-arith -Wstack-protector -Wstringop-overflow=2 -Wundef -Wzero-as-null-pointer-constant -fstack-protector-all -fwrapv -pedantic -std=c++17 -Wall -Wextra
and LDFLAGS,
g++ -Zomf -Zstack 0x2000 -Zhigh-mem -Zlinker "DISABLE 1121" -Zlinker /PM:PM -Zno-fork -o Dooble.exe
Paul should compare them.