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Red Hat Bugzilla – Full Text Bug Listing |
| Summary: | 'grep -i' is very slow with LC_CTYPE=zh_CN.gbk on certain files. | ||||||
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| Product: | Red Hat Enterprise Linux 5 | Reporter: | Kirby Zhou <kirbyzhou> | ||||
| Component: | grep | Assignee: | Jaroslav Škarvada <jskarvad> | ||||
| Status: | CLOSED WONTFIX | QA Contact: | BaseOS QE - Apps <qe-baseos-apps> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | 5.5 | CC: | jskarvad, rvokal | ||||
| Target Milestone: | rc | Keywords: | Rebase | ||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Rebase: Bug Fixes and Enhancements | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2011-07-29 04:59:01 EDT | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | ||||||
| Attachments: |
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Results of running grep-2.6.3 on demo data from attachment: $ time LC_ALL=zh_CN.gbk grep -qi 'chinese.*evaluation' xxxx real 0m0.028s user 0m0.024s sys 0m0.004s $ grep --version GNU grep 2.6.3 pcre-6.6-2.el5_1.7 it seems fixed in RHEL-6-beta and still exist in RHEL-5.5 This request was evaluated by Red Hat Product Management for inclusion in the current release of Red Hat Enterprise Linux. Because the affected component is not scheduled to be updated in the current release, Red Hat is unfortunately unable to address this request at this time. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux. It was fixed in grep-2.6 that is included in RHEL-6 (comment 2). There were major changes of code in grep and backporting is hard/risky. Also the behaviour was changed (e.g. locale handling), thus rebase would probably affect a lot of users. That's why I am closing this as WONTFIX for RHEL-5. |
Created attachment 405499 [details] The demo data Description of problem: 'grep -i' is very slow with LC_CTYPE=zh_CN.gbk on certain files. Version-Release number of selected component (if applicable): grep-2.5.1-55.el5 glibc-2.5-42.el5_4.3 How reproducible: Steps to Reproduce: # xxxx is a file with size=2000000 time LC_ALL=zh_CN.gbk grep -qi 'chinese.*evaluation' xxxx Actual results: real 0m8.589s user 0m8.477s sys 0m0.020s Expected results: less than 1s. Additional info: time LC_ALL=zh_CN.gbk grep -q 'chinese.*evaluation' xxxx real 0m0.004s user 0m0.000s sys 0m0.000s time LC_ALL=en_US grep -qi 'chinese.*evaluation' xxxx real 0m0.004s user 0m0.000s sys 0m0.000s