Quick performance test for setting a variable via capturing output to sub-shell vs a typeset in the running function

set_variable_performance_test.result.log

=== RUN   test_bench_print_subshell_05
--- PASS: test_bench_print_subshell_05 (0.02s)
=== RUN   test_bench_print_subshell_10
--- PASS: test_bench_print_subshell_10 (0.02s)
=== RUN   test_bench_print_subshell_100
--- PASS: test_bench_print_subshell_100 (0.14s)
=== RUN   test_bench_print_subshell_1000
--- PASS: test_bench_print_subshell_1000 (0.79s)
=== RUN   test_bench_typeset_var_05
--- PASS: test_bench_typeset_var_05 (0.00s)
=== RUN   test_bench_typeset_var_10
--- PASS: test_bench_typeset_var_10 (0.00s)
=== RUN   test_bench_typeset_var_100
--- PASS: test_bench_typeset_var_100 (0.00s)
=== RUN   test_bench_typeset_var_1000
--- PASS: test_bench_typeset_var_1000 (0.01s)

set_variable_performance_test.zsh

set_print() {
	print "Hello world"
}
set_typeset() {
	typeset -g "$1"="Hello world"
}

test_bench_print_subshell_05() {
	local var
	for i in {1..5}; do
		var=$(set_print)
	done
}

test_bench_print_subshell_10() {
	local var
	for i in {1..10}; do
		var=$(set_print)
	done
}

test_bench_print_subshell_100() {
	local var
	for i in {1..100}; do
		var=$(set_print)
	done
}

test_bench_print_subshell_1000() {
	local var
	for i in {1..1000}; do
		var=$(set_print)
	done
}

test_bench_typeset_var_05() {
	local var
	for i in {1..5}; do
		set_typeset var
	done
}

test_bench_typeset_var_10() {
	local var
	for i in {1..10}; do
		set_typeset var
	done
}

test_bench_typeset_var_100() {
	local var
	for i in {1..100}; do
		set_typeset var
	done
}

test_bench_typeset_var_1000() {
	local var
	for i in {1..1000}; do
		set_typeset var
	done
}