% OTEL_DENO=true deno run --unstable-otel main.ts
Timer 'my timer' already exists
Timer 'my timer' does not exist

% cat main.ts
console.time("my timer")
console.timeEnd("my timer")

% deno --version
deno 2.2.8 (stable, release, x86_64-unknown-linux-gnu)
v8 13.5.212.10-rusty
typescript 5.7.3