import json,codecs
def records(path):
    dec=json.JSONDecoder(); utf=codecs.getincrementaldecoder('utf-8')();buf=''; state='start'
    with path.open('rb') as f:
        while True:
            chunk=f.read(1024*1024);buf+=utf.decode(chunk,final=not chunk);pos=0
            while True:
                while pos<len(buf) and buf[pos].isspace():pos+=1
                if pos==len(buf):break
                if state=='start':
                    if buf[pos]!='[':raise ValueError('Expected array')
                    pos+=1;state='first';continue
                if state=='end':raise ValueError('Trailing data')
                if state=='separator':
                    if buf[pos]==']':pos+=1;state='end';continue
                    if buf[pos]!=',':raise ValueError('Expected comma')
                    pos+=1;state='value';continue
                if state=='first' and buf[pos]==']':pos+=1;state='end';continue
                try:obj,end=dec.raw_decode(buf,pos)
                except json.JSONDecodeError:
                    if not chunk:raise
                    break
                yield obj;pos=end;state='separator'
            buf=buf[pos:]
            if not chunk:
                if state!='end':raise ValueError('Incomplete JSON')
                break