这个日志是什么意思？

Question

当我的应用程序正在运行（有大量流量）时，我在错误日志中看到了这一点，但我什至不明白它是关于什么的。我想它正在优化一些配置，但我需要更正式的解释。

App 13214 stderr: Trying:
App 13214 stderr:   zc = 9  zm = 9  zs = 0  f = 0
App 13214 stderr:       IDAT size = 5698
App 13214 stderr:   zc = 9  zm = 8  zs = 0  f = 0
App 13214 stderr:       IDAT size = 5698
App 13214 stderr:   zc = 9  zm = 9  zs = 1  f = 0
App 13214 stderr:       IDAT size = 5561
App 13214 stderr:   zc = 9  zm = 8  zs = 1  f = 0
App 13214 stderr:       IDAT size = 5561
App 13214 stderr:   zc = 1  zm = 9  zs = 2  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 9  zs = 3  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 9  zs = 0  f = 1
  zc = 9  zm = 8  zs = 0  f = 1
  zc = 9  zm = 9  zs = 1  f = 1
  zc = 9  zm = 8  zs = 1  f = 1
  zc = 1  zm = 9  zs = 2  f = 1
  zc = 1  zm = 8  zs = 2  f = 1
  zc = 9  zm = 9  zs = 3  f = 1
  zc = 9  zm = 8  zs = 3  f = 1
  zc = 9  zm = 9  zs = 0  f = 2
  zc = 9  zm = 8  zs = 0  f = 2
  zc = 9  zm = 9  zs = 1  f = 2
  zc = 9  zm = 8  zs = 1  f = 2
  zc = 1  zm = 9  zs = 2  f = 2
  zc = 1  zm = 8  zs = 2  f = 2
  zc = 9  zm = 9  zs = 3  f = 2
  zc = 9  zm = 8  zs = 3  f = 2
  zc = 9  zm = 9  zs = 0  f = 3
  zc = 9  zm = 8  zs = 0  f = 3
  zc = 9  zm = 9  zs = 1  f = 3
  zc = 9  zm = 8  zs = 1  f = 3
  zc = 1  zm = 9  zs = 2  f = 3
  zc = 1  zm = 8  zs = 2  f = 3
  zc = 9  zm = 9  zs = 3  f = 3
  zc = 9  zm = 8  zs = 3  f = 3
  zc = 9  zm = 9  zs = 0  f = 4
  zc = 9  zm = 8  zs = 0  f = 4
  zc = 9  zm = 9  zs = 1  f = 4
  zc = 9  zm = 8  zs = 1  f = 4
  zc = 1  zm = 9  zs = 2  f = 4
  zc = 1  zm = 8  zs = 2  f = 4
  zc = 9  zm = 9  zs = 3  f = 4
  zc = 9  zm = 8  zs = 3  f = 4
  zc = 9  zm = 9  zs = 0  f = 5
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 9  zs = 1  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 9  zs = 2  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 9  zs = 3  f = 5
  zc = 9  zm = 8  zs = 3  f = 5

Answer 1

这是optipng用于缩小 PNG 图像的实用程序的详细输出。您可以使用该--quiet选项抑制此输出。虽然可能你的一颗宝石正在调用它，但你几乎无法控制它是否通过选项。