[BUGS:] Memory leak and application crash on reading a large file

[nikolaytsigvintsev]

Hi !

Problem:
Memory leak and application crash
System:
react-native: 0.59.9
react: 16.9.0
react-native-fs: 2.14.1
iPad: 12.1
Xcode: 11.0

I can’t understand why there is a memory leak and application crash when reading a large file using the read() function

Example test code:

onReadAssets = async () => {
const url = ${node.asset.url} // <—— Large file
for (let i = 0; i < 1000; i++) {
await RNFS.read(url, 16777216, 0, 'base64').then((data) => { // 16777216 - 16MB chunk, 0 - start seek
console.log('Read file', i)
}).catch(err => console.log(err))
}
}

Video report: https://www.dropbox.com/s/3lzcrtzst0dnomw/Screen%20Recording%202019-10-18%20at%2010.49.43.mov?dl=0

If I use a function without 'async', then the function recursively calls itself and the application crash

Example test code:

onReadAssets = () => {
const url = ${node.asset.url} // <—— Large file
for (let i = 0; i < 1000; i++) {
RNFS.read(url, 16777216, 0, 'base64').then((data) => { // 16777216 - 16MB chunk, 0 - start seek
console.log('Read file', i)
}).catch(err => console.log(err))
}
}

Video report: https://www.dropbox.com/s/aq3y9dfeqo4mo7o/Screen%20Recording%202019-10-18%20at%2010.52.40.mov?dl=0

I found a similar problem in :
#746

Thanks.

[sarevok89]

I'm currently struggling with the same issue. Using the RNFS.read() method in a loop doesn't release the memory for some reason. There's a linear growth in memory usage with each read/uploaded file chunk.

[H4mxa]

any update on this issue.

[7adidaz]

this is still unresolved, unfortunately.