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https://issues.apache.org/jira/browse/MNG-7899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17770175#comment-17770175
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ASF GitHub Bot commented on MNG-7899:
-------------------------------------
sebastien-doyon commented on code in PR #1270:
URL: https://github.com/apache/maven/pull/1270#discussion_r1340453474
##########
maven-embedder/src/main/java/org/apache/maven/cli/MavenCli.java:
##########
@@ -495,19 +495,6 @@ void logging(CliRequest cliRequest) {
cliRequest.quiet = !cliRequest.verbose &&
commandLine.hasOption(CLIManager.QUIET);
cliRequest.showErrors = cliRequest.verbose ||
commandLine.hasOption(CLIManager.ERRORS);
- slf4jLoggerFactory = LoggerFactory.getILoggerFactory();
Review Comment:
Well, the `MessageUtils.setColorEnabled` must be called before calling
`slf4jConfiguration.setRootLoggerLevel` witch load for the first time the
`MavenSimpleLogger` class. Since this modified class use now static constants,
its is necessary that the colour support is set right before loading the
`MavenSimpleLogger` class.
This was exposed by tests failing in the `core-it-suite`
> Various memory usage improvements
> ---------------------------------
>
> Key: MNG-7899
> URL: https://issues.apache.org/jira/browse/MNG-7899
> Project: Maven
> Issue Type: Improvement
> Components: Design, Patterns & Best Practices, Embedding,
> General, Logging
> Affects Versions: 4.0.0-alpha-2
> Reporter: sebastien
> Priority: Major
>
> Some optimisations can be applied to the code to reduce the use of temporary
> objects.
> Typical improvements identified are:
> * reduce scope of temporary objects creation to avoid creating when not
> needed. Example :
> {code:java}
> public String toString() {
> StringBuilder sb = new StringBuilder(512);
> if (isEmpty()) {
> return "empty";
> }
> for (MetadataGraphVertex v : vertices) {
> .....{code}
> can be replaced by
> {code:java}
> public String toString() {
> if (isEmpty()) {
> return "empty";
> }
> StringBuilder sb = new StringBuilder(512);
> for (MetadataGraphVertex v : vertices) {
> .....{code}
> * Reuse StringBuilder objects in loops by setting its length to zero
> * Use the StringBuilder.append() with index to avoid String.substring().
> Example:
>
> {code:java}
> int idx = resourceName.lastIndexOf('/');
> buffer.append(idx < 0 ? resourceName : resourceName.substring(idx + 1));
> {code}
> can be replaced by
>
> {code:java}
> int idx = resourceName.lastIndexOf('/');
> if (idx < 0) {
> buffer.append(resourceName);
> } else {
> buffer.append(resourceName, idx + 1, resourceName.length());
> } {code}
>
>
> * Replace dynamic string creation static constants when possible
> * Avoid creating temporary strings with + operator when the final
> destination can be used instead, like PrintStream.print() method
> * Avoir using StringBuilder.append() method and util method MessageUtils.a()
> when the final destination can be used instead, like PrintStream.print()
> method
>
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