While there is no x64 Bit build of "Google Chrome", in my quest to look for a performance oriented 64bit native web-browser I found variations of "Mozilla Firefox" specifically optimized and compiled for 64 Bit Windows OS. Both WaterFox and PaleMoon forks features an x64 optimized firefox version for download, but since WaterFox optimizations are "only targeted" towards 64bit systems I tested Firefox x86 (32 Bit) Vs WaterFox x64 and the results are as follows.
The WaterFox builds are compiled with only one target in-mind - a high performance speedier browser based on the Mozilla Firefox source code compiled specifically for 64-Bit systems. While compiling the SSE, SSE2, x64 and /Og /Oi /Ot /Oy /Ob2 /Gs /GF /Gy optimization flags are used for best optimized build.
Interestingly and contradictory to many other benchmarks and expected results, the Firefox x86 vs WaterFox x64 resulted in "Firefox 32 bit" scoring high amongst the two on my Windows 7 64 Bit machine using Peacekeeper browser benchmark.