fflate

High performance (de)compression in an 8kB package
v0.8.2 URL: https://unpkg.com/fflate@0.8.2/umd/index.js
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gzipgunzipdeflateinflatecompressiondecompressionzlibpakojszipbrowsernode.jstinyfastzipunzipnon-blocking

super-regex

Make a regular expression time out if it takes too long to execute
v1.1.0 URL: https://unpkg.com/super-regex@1.1.0/index.js
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regexregexpregularexpressiontimeouttimeoutcancelexpireabortredossecurityscriptexecuteasyncasynchronousworkernon-blocking

png-async

A simple and non-blocking PNG encoder / decoder.
v0.9.4 URL: https://unpkg.com/png-async@0.9.4/lib/index.js
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pngstreamasyncnon-blocking

@ronomon/crypto-async

Fast, reliable cipher, hash and hmac methods executed in Node's threadpool for multi-core throughput.
v5.0.1 URL: https://unpkg.com/@ronomon/crypto-async@5.0.1/index.js
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aesaeadasyncasynchronousblakechacha20-poly1305ciphercipherivcryptoctrdecipherdecipherivevent loopgcmhashhmacnon-blockingsha256sha512threadthreadpoolthroughputworkerzero-copy

yieldable-json

An asynchronous yieldable version of JSON.stringify and JSON.parse
v2.1.0 URL: https://unpkg.com/yieldable-json@2.1.0/index.js
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stringifyparseasynchronousasyncyieldyieldablestringobjectjsonnon-blocking