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< > BotCompany Repo | #1034271 // bench_classValueBasedMethodCache

JavaX fragment (include) [tags: use-pretranspiled]

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// This is not that great. 31 mill/s cache lookups.
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// bench_concurrentHashMapBasedMethodCache_tweaked is still the best
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// (48 mill/s), at least with concurrency level 1.
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//
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// The advantage of ClassValue though is that it doesn't have to be
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// cleaned regularly if I understand this correctly.
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scope bench_classValueBasedMethodCache
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static long #cachesMade;
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static final ClassValue<_MethodCache> methodCacheClassValue = new {
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  @Override
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  protected _MethodCache computeValue(Class<?> type) {
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    ++cachesMade;
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    ret new _MethodCache(type);
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  }
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};
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static _MethodCache getMethodCache_cv(Class c) {
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  ret methodCacheClassValue.get(c);
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}
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svoid bench_classValueBasedMethodCache(int nClasses default 1000) {
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  print("Loading " + nClasses(nClasses));
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  L<Class> classes = map classForName(takeFirst(nClasses, classNamesInJigsawModule("java.base")));
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  print("Have " + nClasses(classes) + ". Filling method caches");
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  print(+cachesMade);
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  time {
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    for (c : classes) assertNotNull(getMethodCache_cv(c));
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  }
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  print(+cachesMade);
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  print("Looking them up again.");
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  benchFor10(-> {
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    for (c : classes) assertNotNull(getMethodCache_cv(c));
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  });
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  print(+cachesMade);
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}

Author comment

Began life as a copy of #1034270

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Travelled to 3 computer(s): bhatertpkbcr, mowyntqkapby, mqqgnosmbjvj

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Snippet ID: #1034271
Snippet name: bench_classValueBasedMethodCache
Eternal ID of this version: #1034271/10
Text MD5: 7bafdd41c3c5391551961036cb903630
Transpilation MD5: 6d7245baa891cab392a2c4ba87fb0689
Author: stefan
Category: javax / performance
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2022-01-31 18:45:36
Source code size: 1229 bytes / 42 lines
Pitched / IR pitched: No / No
Views / Downloads: 142 / 243
Version history: 9 change(s)
Referenced in: [show references]