CodeQL (https://github.com/github/codeql-action) reported a number of functions that take large (64+ bytes) pass-by-value arguments. Passing them by reference could reduce the cost of calling these functions.

vframeStreamCommon::vframeStreamCommon(RegisterMap reg_map)
> RegisterMap is 4728 bytes

ZGenerationYoung::select_tenuring_threshold(ZRelocationSetSelectorStats stats, bool promote_all)
ZGenerationYoung::select_tenuring_threshold(ZRelocationSetSelectorStats stats, bool promote_all)
> ZRelocationSetSelectorStats is 2312 bytes

static double gc_time(ZDirectorGenerationStats generation_stats)
> ZDirectorGenerationStats is 192 bytes

MacroAssembler::movptr(ArrayAddress dst, Register src, Register rscratch)
MacroAssembler::movptr(Register dst, ArrayAddress src)
MacroAssembler::incrementl(ArrayAddress dst, Register rscratch)
Address Address::make_array(ArrayAddress adr)
> ArrayAddress is 120 bytes

TableStatistics::TableStatistics(NumberSeq summary, size_t literal_bytes, size_t bucket_bytes, size_t node_bytes)
TableStatistics::TableStatistics(TableRateStatistics& rate_stats, NumberSeq summary, size_t literal_bytes, size_t bucket_bytes, size_t node_bytes)
> NumberSeq is 72 bytes

template <typename VALUE_SIZE_FUNC> TableStatistics statistics_get(Thread* thread, VALUE_SIZE_FUNC& vs_f, TableStatistics old)
template<typename EVENT> static void emit_table_statistics(TableStatistics statistics)
> TableStatistics is 96 bytes