smuuf/primi

import std.runtime.memory: get_current, get_peak, gc_run


function diff(desc, prev, next) {
    d = next - prev
    print(f' [{desc}] {'+' if (d > 0) else '-'} {d} bytes')
}

// Start.

print(f"Start ({get_current()} bytes)")

base = get_current()
x = range(100_000)
diff("Range 100_000 created", base, get_current())

base = get_current()
for (_ in x) {}
diff("Range 100_000 iterated", base, get_current())

x = null
gc_run()

//
//
//

base = get_current()
x = " " * 100_000
diff("String 100_000 spaces", base, get_current())

x = null
gc_run()

//
//
//

base = get_current()
y = "abc" * 100_000
diff("String 100_000 * 'abc'", base, get_current())

x = null
gc_run()

//
//
//

base = get_current()
x = []
for (_ in range(100_000)) {
    // Directly call function on list type object to avoid function bounding.
    list.push(x, "abc")
}
diff("List of 100_000 abc's", base, get_current())

x = null
gc_run()

//
//
//

base = get_current()
x = "some string"
for (_ in range(100_000)) {
    // Perform function bounding.
    x.format
}
diff("Accessing method on string object 100_000 times", base, get_current())

x = null
gc_run()

// End.

print(f"End (peak {get_peak()} bytes)")