9b189686a5
On Linux distros at least, it's common for cert directories to have symlinks pointing to other certs or even other symlinks. An example from Debian stretch's /etc/ssl/certs directory: ... lrwxrwxrwx 1 root root 46 Aug 13 2018 106f3e4d.0 -> Entrust_Root_Certification_Authority_-_EC1.pem lrwxrwxrwx 1 root root 49 Aug 13 2018 116bf586.0 -> GeoTrust_Primary_Certification_Authority_-_G2.pem lrwxrwxrwx 1 root root 35 Aug 13 2018 128805a3.0 -> EE_Certification_Centre_Root_CA.pem lrwxrwxrwx 1 root root 26 Aug 13 2018 157753a5.0 -> AddTrust_External_Root.pem lrwxrwxrwx 1 root root 59 Aug 13 2018 1636090b.0 -> Hellenic_Academic_and_Research_Institutions_RootCA_2011.pem lrwxrwxrwx 1 root root 23 Aug 13 2018 18856ac4.0 -> SecureSign_RootCA11.pem lrwxrwxrwx 1 root root 31 Aug 13 2018 1d3472b9.0 -> GlobalSign_ECC_Root_CA_-_R5.pem lrwxrwxrwx 1 root root 37 Aug 13 2018 1e08bfd1.0 -> IdenTrust_Public_Sector_Root_CA_1.pem lrwxrwxrwx 1 root root 35 Nov 8 21:13 773e07ad.0 -> OISTE_WISeKey_Global_Root_GC_CA.pem -rw-r--r-- 1 root root 200061 Nov 8 21:24 ca-certificates.crt lrwxrwxrwx 1 root root 27 Nov 8 21:13 dc4d6a89.0 -> GlobalSign_Root_CA_-_R6.pem lrwxrwxrwx 1 root root 62 Nov 8 21:13 GlobalSign_Root_CA_-_R6.pem -> /usr/share/ca-certificates/mozilla/GlobalSign_Root_CA_-_R6.crt drwxr-xr-x 2 root root 4096 Jan 26 2019 java lrwxrwxrwx 1 root root 70 Nov 8 21:13 OISTE_WISeKey_Global_Root_GC_CA.pem -> /usr/share/ca-certificates/mozilla/OISTE_WISeKey_Global_Root_GC_CA.crt ... The root_unix.go code read those certs with same-directory twice before. This drops the number of files read from 258 to 130. Saves about 20 ms. Change-Id: I36a1b1e8bb8d89ed3dac8b6255f9048cb7f08fe8 Reviewed-on: https://go-review.googlesource.com/c/go/+/229918 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Filippo Valsorda <filippo@golang.org> |
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