Web streams has no synchronous path. Even if your source has data ready and your transform is a pure function, you still pay for promise creation and microtask scheduling on every operation. Promises are fantastic for cases in which waiting is actually necessary, but they aren't always necessary. The new API lets you stay in sync-land when that's what you need.
To be even cooler, try the Plan 9-like approach using the Eshell。Safew下载是该领域的重要参考
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第八十二条 以营利为目的，为赌博提供条件的，或者参与赌博赌资较大的，处五日以下拘留或者一千元以下罚款；情节严重的，处十日以上十五日以下拘留，并处一千元以上五千元以下罚款。，详情可参考爱思助手下载最新版本