This also lowers the threshold for converting from a linear cache
to a hash-based cache from 100 to 30 on non-IA32 architectures.
(IA32 still goes to runtime if there's a hash-based cache.)
For SubtypeTestCache benchmarks above this threshold, we see an
improvement varying from ~50-100% to ~700-800% on all architectures,
from lowest number of checks (50) to highest (1000).
For SubtypeTestCache benchmarks below this threshold, no major
changes are seen: generally <5% improvement or <5% regression per
check at most.
TEST=vm/cc/TTS
Change-Id: I83aa7c085ab5a411e944ec660d6b8eba7a788ee0
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-debug-simriscv64-try,vm-aot-linux-debug-x64-try,vm-aot-linux-release-x64-try,vm-aot-linux-product-x64-try,vm-aot-linux-release-simarm64-try,vm-aot-linux-release-simarm_x64-try,vm-aot-linux-debug-x64c-try,vm-aot-tsan-linux-release-x64-try,vm-aot-mac-release-arm64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-aot-dwarf-linux-product-x64-try,vm-linux-release-ia32-try,vm-linux-debug-x64c-try,vm-linux-debug-x64-try,vm-linux-debug-simriscv64-try,vm-linux-release-simarm64-try,vm-linux-release-simarm-try,vm-mac-release-arm64-try,vm-mac-release-x64-try,vm-tsan-linux-release-x64-try,vm-reload-rollback-linux-release-x64-try,vm-reload-linux-release-x64-try,vm-ffi-qemu-linux-release-arm-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/308941
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Tess Strickland
f7e26c508d