asmhatre/spring-boot-demo
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Spring Boot startup time: bean-by-bean diagnosis, and one directory per post

Browse Source 
Adds spring-boot-startup-time/, the companion project for BLOG-618: a runnable
Spring Boot 4.1.1 application on JDK 25 that installs BufferingApplicationStartup
and FlightRecorderApplicationStartup behind a system property, and a /diag/startup
endpoint that computes step self time -- the number /actuator/startup does not give
you and the one that names the actual culprits.

Captured under docs/output/: the step tree sorted both ways, the same startup as JFR
events, a +5000-class experiment putting 0.11 ms per scanned class on the classpath
scan tax, the silent truncation a 2048-step buffer performs, and JDK 25 AOT cache
timings (6.93 s to 4.82 s). Post body and metadata live in post/.

Moves the existing Actuator project into actuator-in-production/ so the repository
holds one directory per article; the root README is now an index.
This commit is contained in:
Ankur Mhatre
2026-09-04 23:58:38 +05:30
parent 4b6cefa60a
commit 958b401f0f
112 changed files with 2744 additions and 154 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
.gitignore vendored
View File

@@ -4,3 +4,8 @@ target/
.idea/
*.iml
.vscode/
*.jfr
*.aot
*.aotconf
# generated by spring-boot-startup-time/scripts/gen-bulk.sh
spring-boot-startup-time/src/main/java/com/ankurm/startup/bulk/