{"action":"created","comment":{"url":"https://api.github.com/repos/jenkinsci/support-core-plugin/pulls/comments/239145459","pull_request_review_id":181855791,"id":239145459,"node_id":"MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDIzOTE0NTQ1OQ==","diff_hunk":"@@ -141,9 +141,12 @@ private ContentMappings(@Nonnull XmlProxy proxy) {\n      * Looks up or creates a new ContentMapping for the given original string and a ContentMapping generator.\n      */\n     public @Nonnull ContentMapping getMappingOrCreate(@Nonnull String original, @Nonnull Function<String, ContentMapping> generator) {\n+        boolean isNew = !mappings.containsKey(original);\n         ContentMapping mapping = mappings.computeIfAbsent(original, generator);","path":"src/main/java/com/cloudbees/jenkins/support/filter/ContentMappings.java","position":5,"original_position":5,"commit_id":"498a1774240b83b02d1ed1bfd2c55832d801554d","original_commit_id":"498a1774240b83b02d1ed1bfd2c55832d801554d","user":{"login":"varyvol","id":6572596,"node_id":"MDQ6VXNlcjY1NzI1OTY=","avatar_url":"https://avatars3.githubusercontent.com/u/6572596?v=4","gravatar_id":"","url":"https://api.github.com/users/varyvol","html_url":"https://github.com/varyvol","followers_url":"https://api.github.com/users/varyvol/followers","following_url":"https://api.github.com/users/varyvol/following{/other_user}","gists_url":"https://api.github.com/users/varyvol/gists{/gist_id}","starred_url":"https://api.github.com/users/varyvol/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/varyvol/subscriptions","organizations_url":"https://api.github.com/users/varyvol/orgs","repos_url":"https://api.github.com/users/varyvol/repos","events_url":"https://api.github.com/users/varyvol/events{/privacy}","received_events_url":"https://api.github.com/users/varyvol/received_events","type":"User","site_admin":false},"body":"Maybe you could use a new generator to avoid having to inspect for the keys. If I am not wrong, the generator is called only if necessary, and you could create onw that would: set isNew to true and then call the real generator.","created_at":"2018-12-05T16:43:14Z","updated_at":"2018-12-05T16:53:14Z","html_url":"https://github.com/jenkinsci/support-core-plugin/pull/158#discussion_r239145459","pull_request_url":"https://api.github.com/repos/jenkinsci/support-core-plugin/pulls/158","author_association":"CONTRIBUTOR","_links":{"self":{"href":"https://api.github.com/repos/jenkinsci/support-core-plugin/pulls/comments/239145459"},"html":{"href":"https://github.com/jenkinsci/support-core-plugin/pull/158#discussion_r239145459"},"pull_request":{"href":"https://api.github.com/repos/jenkinsci/support-core-plugin/pulls/158"}}},"pull_request":{"url":"https://api.github.com/repos/jenkinsci/support-core-plugin/pulls/158","id":235760453,"node_id":"MDExOlB1bGxSZXF1ZXN0MjM1NzYwNDUz","html_url":"https://github.com/jenkinsci/support-core-plugin/pull/158","diff_url":"https://github.com/jenkinsci/support-core-plugin/pull/158.diff","patch_url":"https://github.com/jenkinsci/support-core-plugin/pull/158.patch","issue_url":"https://api.github.com/repos/jenkinsci/support-core-plugin/issues/158","number":158,"state":"open","locked":false,"title":"[JENKINS-54999] Performance issue due to the bundle anonymization feature of the support-core plugin","user":{"login":"fcojfernandez","id":31063239,"node_id":"MDQ6VXNlcjMxMDYzMjM5","avatar_url":"https://avatars3.githubusercontent.com/u/31063239?v=4","gravatar_id":"","url":"https://api.github.com/users/fcojfernandez","html_url":"https://github.com/fcojfernandez","followers_url":"https://api.github.com/users/fcojfernandez/followers","following_url":"https://api.github.com/users/fcojfernandez/following{/other_user}","gists_url":"https://api.github.com/users/fcojfernandez/gists{/gist_id}","starred_url":"https://api.github.com/users/fcojfernandez/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fcojfernandez/subscriptions","organizations_url":"https://api.github.com/users/fcojfernandez/orgs","repos_url":"https://api.github.com/users/fcojfernandez/repos","events_url":"https://api.github.com/users/fcojfernandez/events{/privacy}","received_events_url":"https://api.github.com/users/fcojfernandez/received_events","type":"User","site_admin":false},"body":"See [JENKINS-54999](https://issues.jenkins-ci.org/browse/JENKINS-54999)\r\n\r\nThe CPU usage is peaking when the filtering is enabled.\r\n\r\nThe CPU usage is high even in `support-core-2.47`, which is the version previous to anonymization since it's moving huge files. Anonymization implies to process huge files such as logs. The difference with previous versions is the time to process needed to anonymize those files. **That process is performed line per line and applies some filter to each line of each log and file**, so the anonymization takes a long time. This heavy process during such a long time makes the instances unresponsive. \r\n\r\n**Where can we touch to improve the performance?**\r\n1. [InetAddressContentFilter](https://github.com/jenkinsci/support-core-plugin/blob/86b92654ccf5717792225714c2c7f07c43f1754d/src/main/java/com/cloudbees/jenkins/support/filter/InetAddressContentFilter.java#L72) search for any String that is susceptible to be an IP address and create an new mapping object. Even if the mapping existed previously, the mapping file is saved all the times by the [ContentMappings class](https://github.com/jenkinsci/support-core-plugin/blob/86b92654ccf5717792225714c2c7f07c43f1754d/src/main/java/com/cloudbees/jenkins/support/filter/ContentMappings.java#L146) and not only when the mapping is a new one. That's a bunch of unnecessary disk accesses on write mode.\r\n1. Both [InetAddressContentFilter](https://github.com/jenkinsci/support-core-plugin/blob/86b92654ccf5717792225714c2c7f07c43f1754d/src/main/java/com/cloudbees/jenkins/support/filter/InetAddressContentFilter.java#L77) and [SensitiveContentFilter](https://github.com/jenkinsci/support-core-plugin/blob/86b92654ccf5717792225714c2c7f07c43f1754d/src/main/java/com/cloudbees/jenkins/support/filter/SensitiveContentFilter.java#L56) are using the method [ContentMapping#filter](https://github.com/jenkinsci/support-core-plugin/blob/master/src/main/java/com/cloudbees/jenkins/support/filter/ContentMapping.java#L95-L97) which executes the _Pattern#matcher_ and therefore compiles the pattern every time the filter is executed. This is a heavy operation and as the filter is executed line per line the process needs a long time to be executed. Since the mapping has already got the replacement String, we can substitute the Pattern objects with _StringUtils_ invocations.\r\n1. As the logs are showing, the filtering is taking place inside the OutputStream ([FilteredOutputStream](https://github.com/jenkinsci/support-core-plugin/blob/master/src/main/java/com/cloudbees/jenkins/support/filter/FilteredOutputStream.java) and [FilteredWriter](https://github.com/jenkinsci/support-core-plugin/blob/master/src/main/java/com/cloudbees/jenkins/support/filter/FilteredWriter.java)) objects that are writing the content of the files in the final zip file. It's less expensive (from the PoV of the process time) to filter the content previously to write it on the zip file. The more Stream are needed, the more expensive is the performance.\r\n\r\n**Comparative numbers**\r\nSome checks using 2x85MB and 1x105Mb logs and files.\r\n- Version 2.47: 10 sec.\r\n- Master with anonymisation disabled: 90 sec.\r\n- Master with anonymisation enabled: 638 sec.\r\n- Current PR with anonymisation disabled: 90 sec.\r\n- Current PR with anonymisation enabled: 169 sec.\r\n\r\n@reviewbybees @varyvol @jvz @aheritier 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