- only flush if necessary when idle
- only flush if necessary when idle

dixitk13/log-courier,MichaelLiZhou/log-courier,dixitk13/log-courier,scrapinghub/log-courier,srizzling/log-courier,linearregression/log-courier,scrapinghub/log-courier,MichaelLiZhou/log-courier,MichaelLiZhou/log-courier,linearregression/log-courier,dixitk13/log-courier,linearregression/log-courier,scrapinghub/log-courier,srizzling/log-courier,srizzling/log-courier