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https://issues.apache.org/jira/browse/IOTDB-4791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17626457#comment-17626457
]
Liuxuxin commented on IOTDB-4791:
---------------------------------
Test program:
public static String getRandomString(int length) {
String str = "abcdefghijklmnopqrstuvwxyzABCDEGHIJKLMNOPQRSUVWXYZ";
Random random = new Random();
StringBuffer sb = new StringBuffer();
int len = str.length();
for (int i = 0; i < length; i++) {
int number = random.nextInt(len);
sb.append(str.charAt(number));
}
return sb.toString();
}
public static void main(String[] args) {
long totalCost = 0;
for (int i = 0; i < 1000000; ++i) {
StringBuilder builder = new StringBuilder().append("root.");
for (int j = 0; j < 5; ++j) {
builder.append(getRandomString(5));
builder.append(".");
}
builder.append(getRandomString(5));
long startTime = System.nanoTime();
new Path(builder.toString(), true);
totalCost += System.nanoTime() - startTime;
}
System.out.println(totalCost);
}
> readChunkMetadataAndConstructIndexTree is too slow for sealing TsFile
> ---------------------------------------------------------------------
>
> Key: IOTDB-4791
> URL: https://issues.apache.org/jira/browse/IOTDB-4791
> Project: Apache IoTDB
> Issue Type: Improvement
> Components: Core/TsFile
> Reporter: yusicheng
> Assignee: Liuxuxin
> Priority: Major
> Attachments: image-2022-10-28-16-48-57-842.png
>
>
> !image-2022-10-28-16-48-57-842.png!
> you can see this method spend almost half time on Path:<init>, is there any
> possible to speed up this method?
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