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Conncache using case-sensitive hash leads to missed reuse opportunities #7159

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piru opened this issue May 31, 2021 · 0 comments
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Conncache using case-sensitive hash leads to missed reuse opportunities #7159

piru opened this issue May 31, 2021 · 0 comments
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connecting & proxies performance

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@piru
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piru commented May 31, 2021

I did this

curl -v https://example.com https://Example.com

I expected the following

Connection being reused instead of new connection being created for the 2nd request.

curl/libcurl version

curl 7.77.1-DEV (x86_64-pc-linux-gnu) libcurl/7.77.1-DEV OpenSSL/1.1.1k zlib/1.2.11 brotli/1.0.9 libidn2/2.3.0 libpsl/0.21.0 (+libidn2/2.3.0) nghttp2/1.43.0 librtmp/2.3 OpenLDAP/2.4.57 libmetalink/0.1.3
Release-Date: [unreleased]
Protocols: dict file ftp ftps gopher gophers http https imap imaps ldap ldaps mqtt pop3 pop3s rtmp rtsp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS brotli HSTS HTTP2 HTTPS-proxy IDN IPv6 Largefile libz Metalink NTLM NTLM_WB PSL SSL TLS-SRP UnixSockets

operating system

Linux anonymized 5.10.0-6-amd64 #1 SMP Debian 5.10.28-1 (2021-04-09) x86_64 GNU/Linux
bagder added a commit that referenced this issue Jun 1, 2021
@bagder
conncache: lowercase the hash key for better match
241310e 
As host names are case insensitive, the use of case sensitive hashing
caused unnecesary cache misses and therefore lost performance. This
lowercases the hash key.

Reported-by: Harry Sintonen
Fixes #7159
@bagder bagder mentioned this issue Jun 1, 2021
Closed
@bagder bagder closed this as completed in dddad33 Jun 1, 2021
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conncache: lowercase the hash key for better match curl/curl
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@bagder @piru