import { Worker } from "worker_threads" ; import { wrap } from "./rpc/node" ; import { parseTokens } from "./runtime/tokenizer" ; const MAX_TOKENS = 512 ; export function createTransformer ( workerPath , workers ) { const apis = [ ... Array ( workers ) . keys ( ) ] . map ( ( _i ) => wrap ( new Worker ( workerPath ) ) ) ; return { terminate ( ) { apis . forEach ( ( w ) => w . terminate ( ) ) ; } , transform : async ( input , opts ? ) => { let i = 0 ; const promises = [ ] ; let _tokens = [ ] ; let _tokensList = [ ] ; let _currentTokensCount = 0 ; const _hydrate = ( ) => { promises . push ( apis [ i ++ % apis . length ] . exec ( "transform" , _tokensList , opts ) ) ; _tokensList = [ ] ; _currentTokensCount = 0 ; } ; const _enque = ( tokens , end = false ) => { if ( tokens . length + _currentTokensCount >= MAX_TOKENS ) _hydrate ( ) ; _currentTokensCount += tokens . length ; _tokensList . push ( tokens ) ; if ( _currentTokensCount >= MAX_TOKENS ) _hydrate ( ) ; if ( end ) _hydrate ( ) ; } ; for ( const t of parseTokens ( input ) ) { if ( t === "\n" ) { _enque ( _tokens ) ; _tokens = [ ] ; } else { _tokens . push ( t ) ; } } if ( _tokens . length ) _enque ( _tokens , true ) ; const results = await Promise . all ( promises ) ; return results . flat ( ) . join ( "" ) ; } , } ; }