I don’t actually think it’s “safe” since it ignores evaluation order. I still did that in esbuild because it was a TS-specific construct, but I might actually have to undo that optimization if it gets standardized in JS with a well-specified inline evaluation order.

A 10x Faster TypeScript - TypeScript Embarking on a native port of the existing TypeScript compiler and toolset to achieve a 10x performance speed-up.

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devblogs.microsoft.com/typescript/t...