Also to explain why "ls" is slow - it has to do just that - stat each entry
and then sort (plus you have the overhead of a separate process of course).
On Thu, Jun 21, 2012 at 4:47 PM, Tim Caswell <t...@creationix.com> wrote:
> What you want to do is readdir, and then stat each entry. Once you have
> the file stats, you can sort the list in JavaScript. The control-flow can
> be tricky the first time you do this since stat is an async function.
> There are many examples on the web of readdir with stat. There might even
> be libraries to do this in npm.
>
>
> On Thu, Jun 21, 2012 at 2:51 PM, Adeel Qureshi <adeelmahm...@gmail.com>wrote:
>
>> I was trying to get a listing of files in a directory and send the output
>> to clients using socket.io. First I tried with readdir which works good
>> and pretty fast but is not able to sort the files by modified date (or
>> atleast I wasnt able to find out how).
>>
>> fs.readdir(logDrivesPath.replace(/#/,drive), function(err, files){
>> console.log(files);
>> socket.emit('filesList', files);
>> });
>>
>> so i then used child process ls to get the listing in correct sorting
>> order
>>
>> var ls = exec('ls -t ' + logDrivesPath.replace(/#/,drive) + ' | xargs -n1
>> basename',
>> function(err, stdout, stderr){
>> console.log("ls exec completed");
>> if(err == null){
>> socket.emit('filesList',
>> stdout.toString('utf8').split('\n'));
>> }
>> else{
>> console.log(stderr);
>> console.log(err);
>> }
>> });
>>
>> the second option works fine but its much slower than the readdir option.
>> It almost takes 3-4 seconds to get the listing while readdir returns the
>> same list in less than a second so there is a significant difference. I was
>> wondering if there is a way to use readdir but get the files sorted
>> properly and secondly why is the childprocess option so much slower than
>> readdir.
>>
>> Thanks
>> Adeel
>>
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