We'll take a 25x speedup
SourceTargetIdentical in N fontsⅰ (U+2170)i36ⅴ (U+2174)v36ⅹ (U+2179)x36ⅼ (U+217C)l38ⅽ (U+217D)c36ⅾ (U+217E)d36ⅿ (U+217F)m36
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What TransformStreams are supposed to do is check for backpressure on the controller and use promises to communicate that back to the writer:
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