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/*
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Compress and deocmpression JSON to a Buffer. This buffer *is* suitable
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to write to an lz4 file and lz4 -d will work with it.
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NOTE: I was worried because lz4-napi's compressSync and uncompressSync 
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seem to have a MASSIVE memory leak.  I tested these functions via the
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following, and did NOT observe a memory leak.  So it's maybe just a problem
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with their sync functions, fortunately.
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a = require('@cocalc/sync-fs/lib/compressed-json')
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t=Date.now(); for(i=0;i<10000;i++) { await a.fromCompressedJSON(await a.toCompressedJSON({a:'x'.repeat(1000000)}))}; Date.now()-t
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*/
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import { compressFrame, decompressFrame } from "lz4-napi";
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export async function toCompressedJSON(obj: any): Promise<Buffer> {
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  return await compressFrame(Buffer.from(JSON.stringify(obj)));
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}
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export async function fromCompressedJSON(compressedJSON: Buffer): Promise<any> {
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  return JSON.parse((await decompressFrame(compressedJSON)).toString());
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}
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