### Timer changes

Go 1.23 makes two significant changes to the implementation of
[time.Timer] and [time.Ticker].

First, `Timer`s and `Ticker`s that are no longer referred to by the program
become eligible for garbage collection immediately, even if their
`Stop` methods have not been called.
Earlier versions of Go did not collect unstopped `Timer`s until after
they had fired and never collected unstopped `Ticker`s.

### Go 1.23

Go 1.23 changed the channels created by package time to be unbuffered
(synchronous), which makes correct use of the [`Timer.Stop`](/pkg/time/#Timer.Stop)
and [`Timer.Reset`](/pkg/time/#Timer.Reset) method results much easier.
The [`asynctimerchan` setting](/pkg/time/#NewTimer) disables this change.
There are no runtime metrics for this change,

			w, _ := zw.CreateHeader(&FileHeader{
				Name:   "foo",
				Method: Deflate,
			})
			w.Write(bigBuf)
		}
		zw.Close()
	}

	b.ReportAllocs()
	// Run once and then reset the timer.
	// This effectively discards the very large initial flate setup cost,
	// as well as the initialization of bigBuf.
	runOnce(&bytes.Buffer{})
	b.ResetTimer()

	b.RunParallel(func(pb *testing.PB) {

// deliver a final empty token (which is different from a nil token).
// One could achieve the same behavior with a custom error value but
// providing one here is tidier.
// See the emptyFinalToken example for a use of this value.
var ErrFinalToken = errors.New("final token")

// Scan advances the [Scanner] to the next token, which will then be

pkg syscall (darwin-arm64), const EVFILT_THREADMARKER = 14
pkg syscall (darwin-arm64), const EVFILT_THREADMARKER ideal-int
pkg syscall (darwin-arm64), const EVFILT_TIMER = -7
pkg syscall (darwin-arm64), const EVFILT_TIMER ideal-int
pkg syscall (darwin-arm64), const EVFILT_USER = -10
pkg syscall (darwin-arm64), const EVFILT_USER ideal-int
pkg syscall (darwin-arm64), const EVFILT_VM = -12

pkg syscall (freebsd-arm64), const EVFILT_SYSCOUNT = 11
pkg syscall (freebsd-arm64), const EVFILT_SYSCOUNT ideal-int
pkg syscall (freebsd-arm64), const EVFILT_TIMER = -7
pkg syscall (freebsd-arm64), const EVFILT_TIMER ideal-int
pkg syscall (freebsd-arm64), const EVFILT_USER = -11
pkg syscall (freebsd-arm64), const EVFILT_USER ideal-int
pkg syscall (freebsd-arm64), const EVFILT_VNODE = -4

pkg syscall (freebsd-riscv64), const EVFILT_SYSCOUNT = 11 #53466
pkg syscall (freebsd-riscv64), const EVFILT_SYSCOUNT ideal-int #53466
pkg syscall (freebsd-riscv64), const EVFILT_TIMER = -7 #53466
pkg syscall (freebsd-riscv64), const EVFILT_TIMER ideal-int #53466
pkg syscall (freebsd-riscv64), const EVFILT_USER = -11 #53466
pkg syscall (freebsd-riscv64), const EVFILT_USER ideal-int #53466