From 6255a2c128129675714f3da3e952fcc7eabe080c Mon Sep 17 00:00:00 2001 From: Andy Clement Date: Fri, 20 Oct 2017 14:48:57 -0700 Subject: [PATCH] 1.8.12 readme --- docs/dist/doc/README-1812.html | 98 ++++++++++++++++++++++++++++++++++ docs/dist/doc/index.html | 1 + 2 files changed, 99 insertions(+) create mode 100644 docs/dist/doc/README-1812.html diff --git a/docs/dist/doc/README-1812.html b/docs/dist/doc/README-1812.html new file mode 100644 index 000000000..1d5e24335 --- /dev/null +++ b/docs/dist/doc/README-1812.html @@ -0,0 +1,98 @@ + + +AspectJ 1.8.12 Readme + + + + +
+© Copyright 2017 Contributors. +All rights reserved. +
+ +

AspectJ 1.8.12 Readme

+ +

This is a small release that includes a backport of some 1.9.0 work that improves +the performance of Spring AOP (or any system consuming AspectJ in a similar way to Spring). + +

Dave Syer recently created a series of benchmarks for checking the speed of Spring-AspectJ: +https://github.com/dsyer/spring-boot-aspectj + +

Here we can see the numbers for AspectJ 1.8.11 (on an older Macbook Pro): + +


+Benchmark                 (scale)  Mode  Cnt   Score   Error  Units
+StartupBenchmark.ltw          N/A  avgt   10   2.656 ~ 0.166   s/op
+StartupBenchmark.ltw_100      N/A  avgt   10   2.618 ~ 0.063   s/op
+StartupBenchmark.spring     v0_10  avgt   10   2.071 ~ 0.044   s/op
+StartupBenchmark.spring     v1_10  avgt   10   2.210 ~ 0.058   s/op
+StartupBenchmark.spring    v1_100  avgt   10   2.260 ~ 0.068   s/op
+StartupBenchmark.spring    v10_50  avgt   10   2.933 ~ 0.039   s/op
+StartupBenchmark.spring    v20_50  avgt   10   3.832 ~ 0.094   s/op
+StartupBenchmark.spring   v20_100  avgt   10   3.959 ~ 0.047   s/op
+StartupBenchmark.spring     a0_10  avgt   10   2.073 ~ 0.028   s/op
+StartupBenchmark.spring     a1_10  avgt   10   2.729 ~ 0.061   s/op
+StartupBenchmark.spring    a1_100  avgt   10   2.750 ~ 0.029   s/op
+StartupBenchmark.spring    a10_50  avgt   10   7.153 ~ 0.075   s/op
+StartupBenchmark.spring   a10_100  avgt   10   7.152 ~ 0.059   s/op
+StartupBenchmark.spring    a20_50  avgt   10  11.430 ~ 0.105   s/op
+StartupBenchmark.spring   a20_100  avgt   10  11.497 ~ 0.162   s/op
+
+ +

So this is the average *startup time* of an app affected by aspects applying to the beans involved. +Where numbers are referenced the first is the number of aspects/pointcuts and the second +is the number of beans. The 'a' indicates an annotation based pointcut vs a non-annotation +based pointcut ('v'). Notice things are much worse for annotation based pointcuts. At 20 +pointcuts and 50 beans the app is 9 seconds slower to startup. +
+ +

In AspectJ 1.8.12 and 1.9.0.RC1 some work has been done here. The key change is to recognize that the use +of annotations with runtime retention is much more likely than annotations with class level +retention. Retrieving annotations with class retention is costly because we must open the +bytes for the class file and dig around in there (vs runtime retention which are immediately +accessible by reflection on the types). In 1.8.11 the actual type of the annotation involved +in the matching is ignored and the code will fetch *all* the annotations on the type/method/field +being matched against. So even if the match is looking for a runtime retention annotation, we +were doing the costly thing of fetching any class retention annotations. In 1.8.12/1.9.0.RC1 +we take the type of the match annotation into account - allowing us to skip opening the classfiles +in many cases. There is also some deeper work on activating caches that were not previously +being used correctly but the primary change is factoring in the annotation type. + +

What difference does that make? + +AspectJ 1.8.12: +


+Benchmark                 (scale)  Mode  Cnt  Score   Error  Units
+StartupBenchmark.ltw          N/A  avgt   10  2.620 ~ 0.130   s/op
+StartupBenchmark.ltw_100      N/A  avgt   10  2.567 ~ 0.038   s/op
+StartupBenchmark.spring     v0_10  avgt   10  2.044 ~ 0.027   s/op
+StartupBenchmark.spring     v1_10  avgt   10  2.195 ~ 0.026   s/op
+StartupBenchmark.spring    v1_100  avgt   10  2.237 ~ 0.039   s/op
+StartupBenchmark.spring    v10_50  avgt   10  2.774 ~ 0.038   s/op
+StartupBenchmark.spring    v20_50  avgt   10  3.488 ~ 0.116   s/op
+StartupBenchmark.spring   v20_100  avgt   10  3.642 ~ 0.080   s/op
+StartupBenchmark.spring     a0_10  avgt   10  2.067 ~ 0.034   s/op
+StartupBenchmark.spring     a1_10  avgt   10  2.159 ~ 0.030   s/op
+StartupBenchmark.spring    a1_100  avgt   10  2.207 ~ 0.020   s/op
+StartupBenchmark.spring    a10_50  avgt   10  2.471 ~ 0.031   s/op
+StartupBenchmark.spring   a10_100  avgt   10  2.517 ~ 0.045   s/op
+StartupBenchmark.spring    a20_50  avgt   10  2.842 ~ 0.049   s/op
+StartupBenchmark.spring   a20_100  avgt   10  2.916 ~ 0.145   s/op
+
+ +

Look at the a20_100 case - instead of impacting start time by 9 seconds, it impacts it by 1 second. + +

+ + + diff --git a/docs/dist/doc/index.html b/docs/dist/doc/index.html index d600c82b7..7bbe1633c 100644 --- a/docs/dist/doc/index.html +++ b/docs/dist/doc/index.html @@ -138,6 +138,7 @@ README's Changes and porting guide for AspectJ + 1.8.10, 1.8.10, 1.8.10, 1.8.9, -- 2.39.5