apoc Δημοσ. 17 Μαΐου 2003 Δημοσ. 17 Μαΐου 2003 Απο γνωστο blog του χωρου! http://www.freeroller.net/page/cpurdy/20030516 --------------------------- .NET perf: quick follow-up I didn't expect so much press on this. Holy cow. Let me quickly re-iterate the following: I was only wasting my time on this because Microsoft was (somewhat secretly) paying yet another company / university / website / whatever to "independently verify" that .NET was somehow faster than Java, and tRolf was being annoying about it, so I got sucked into the nerd vortex before I knew it. Here's a quick top-ten (if I get that far) list of reasons not to use to choose between .NET and Java, starting with yours-truly: 1. One is a little faster than another on a particular micro-benchmark. 2. You read a paper from Microsoft or Sun (or Oracle etc. ...) showing how much better one was than the other. 3. You read a paper from an "independent source" showing how much better one was than the other, yet the independent source was paid to do the study / article / whatever. 4. You like Bill Gates or Scott McNeally (or Larry etc. ...). 5. You dislike Bill Gates or Scott McNeally (or Larry etc. ...). 6. You think Microsoft or Sun (or IBM or Oracle ...) is evil. 7. You think Microsoft or Sun (or IBM or Oracle ...) is awesome. 8. You read an "unbiased" article on TheServerSide.com or GotDotNet.com (aka Microsoft.com) 9. You read a seemingly "independent" TCO analysis that showed that one would save you ungodly amounts of money in your budget. 10. tRolf said one was better than the other. Have a good weekend. I'll try to fix some of the complaints etc. on this silly benchmark and give it another spin. When I'm back, I'll pull a Carlos and post a top-ten on how to make the decision between .NET and Java, and I'll give you this one little hint: Performance is not even on the list. Peace. (Fri May 16 18:16:32 EDT 2003/Fri May 16 18:14:30 EDT 2003) .NET performance still seriously lags Java (For the background of this message, check out the laboriously long thread with my friend tRolf.) Let me start by saying that the results I got from this test were a bit unexpected. I tested on the following versions: .NET 1.0sp2: Microsoft ® Visual C# .NET Compiler version 7.00.9466 for Microsoft ® .NET Framework version 1.0.3705 Copyright © Microsoft Corporation 2001. All rights reserved. .NET 1.1: Microsoft ® Visual C# .NET Compiler version 7.10.3052.4 for Microsoft ® .NET Framework version 1.1.4322 Copyright © Microsoft Corporation 2001-2002. All rights reserved. Sun Hotspot Server JVM from JDK 1.3.1_04: java version "1.3.1_04" Java 2 Runtime Environment, Standard Edition (build 1.3.1_04-b02) Java HotSpot Server VM (build 1.3.1_04-b02, mixed mode) Sun Hotspot Server JVM from JDK 1.4.0_02: java version "1.4.0_02" Java 2 Runtime Environment, Standard Edition (build 1.4.0_02-b02) Java HotSpot Server VM (build 1.4.0_02-b02, mixed mode) Sun Hotspot Server JVM from JDK 1.4.1_02: java version "1.4.1_02" Java 2 Runtime Environment, Standard Edition (build 1.4.1_02-b06) Java HotSpot Client VM (build 1.4.1_02-b06, mixed mode) I tested all JVMs with 24, 32, 40, 48, 56, and 64MB of memory by setting -Xms equal to -Xmx. I used the -server command line switch to force the server version of the VM. Otherwise, there were no switches used. I undid some of the bastardizations of the original test code. Here is the code, in full: C# // C# Create 100,000 people in an ArrayList and access them using System; using System.Collections; public class ManyPeople { public static void Main() { for (int i = 0; i < 100; i++) test(i); } public static void test(int iIter) { DateTime start = DateTime.Now; for (int i = 0; i < 20; i++) new ManyPeople().Average(); DateTime finish = DateTime.Now; Console.WriteLine("Total time for iteration " + iIter + ": " + (finish - start)); } private long Average() { ArrayList list = new ArrayList(100000); for (int i = 0; i < 100000; i++) list.Add(new Person(i, "John " + i)); long silly = 0; foreach (Person p in list) silly += p.Id; return silly / 100000; } } // Person.cs: a very simple guy public class Person { int id; string name; public Person(int anId, string aName) { this.id = anId; this.name = aName; } public int Id { get { return this.id; } } } Java: // Java Create 100,000 people in an ArrayList and access them import java.util.*; public class ManyPeople { public static void main(String[] args) { for (int i = 0; i < 100; i++) test(i); } public static void test(int iIter) { long start = System.currentTimeMillis(); for (int i = 0; i < 20; i++) new ManyPeople().average(); long finish = System.currentTimeMillis(); System.out.println("Total time for iteration " + iIter + ": " + (finish - start)); } private long average() { ArrayList list = new ArrayList(100000); for (int i = 0; i < 100000; i++) list.add(new Person(i, "John " + i)); long silly = 0; for (int i = 0; i < 100000; i++) silly += ((Person)list.get(i)).getId(); return silly; } } // Person.java: a very simple guy class Person { private int id; private String name; public Person(int anId, String aName) { this.id = anId; this.name = aName; } public int getId() { return this.id; } } The changes allow me to see the first run (which with Hotspot is interpreted) versus the other runs. Before running, I cleaned up my task manager, registry, etc. to minimize other processes running, and rebooted my Windows 2000 sp2 (?) notebook, which is a P3-1Ghz with 1GB RAM. Here are the results (just first six runs per): .NET 1.0sp2: ManyPeople Total time for iteration 0: 00:00:07.3004976 Total time for iteration 1: 00:00:07.0501376 Total time for iteration 2: 00:00:07.2504256 Total time for iteration 3: 00:00:07.7311168 Total time for iteration 4: 00:00:07.5007856 Total time for iteration 5: 00:00:07.5007856 (I ran it several times; these were the best times I got for .NET 1.0sp2.) .NET 1.1: ManyPeople Total time for iteration 0: 00:00:08.0916352 Total time for iteration 1: 00:00:08.5222544 Total time for iteration 2: 00:00:08.3520096 Total time for iteration 3: 00:00:08.6324128 Total time for iteration 4: 00:00:08.3419952 Total time for iteration 5: 00:00:08.1617360 (Yes, you read the numbers correctly. In this test, .NET 1.1 was about 15% slower than .NET 1.0sp2. I will say that this is unusual from my benchmarking experience; the 1.1 release is definitely faster than the 1.0sp2 release for most types of applications.) Sun Hotspot Server JVM from JDK 1.3.1_04: java -server -Xms24m -Xmx24m ManyPeople Total time for iteration 0: 8101 Total time for iteration 1: 7852 Total time for iteration 2: 7851 Total time for iteration 3: 7851 Total time for iteration 4: 7841 Total time for iteration 5: 7842 java -server -Xms32m -Xmx32m ManyPeople Total time for iteration 0: 7822 Total time for iteration 1: 7540 Total time for iteration 2: 7451 Total time for iteration 3: 7541 Total time for iteration 4: 7541 Total time for iteration 5: 7441 java -server -Xms40m -Xmx40m ManyPeople Total time for iteration 0: 7901 Total time for iteration 1: 7180 Total time for iteration 2: 7171 Total time for iteration 3: 7170 Total time for iteration 4: 7190 Total time for iteration 5: 7171 java -server -Xms48m -Xmx48m ManyPeople Total time for iteration 0: 8122 Total time for iteration 1: 7160 Total time for iteration 2: 7160 Total time for iteration 3: 7170 Total time for iteration 4: 7161 Total time for iteration 5: 7170 java -server -Xms56m -Xmx56m ManyPeople Total time for iteration 0: 7801 Total time for iteration 1: 7371 Total time for iteration 2: 8021 Total time for iteration 3: 8012 Total time for iteration 4: 8011 Total time for iteration 5: 8022 java -server -Xms64m -Xmx64m ManyPeople Total time for iteration 0: 7941 Total time for iteration 1: 7701 Total time for iteration 2: 7731 Total time for iteration 3: 8022 Total time for iteration 4: 7741 Total time for iteration 5: 7731 Sun Hotspot Server JVM from JDK 1.4.0_02: java -server -Xms24m -Xmx24m ManyPeople Total time for iteration 0: 8022 Total time for iteration 1: 7851 Total time for iteration 2: 7881 Total time for iteration 3: 7802 Total time for iteration 4: 7841 Total time for iteration 5: 7861 java -server -Xms32m -Xmx32m ManyPeople Total time for iteration 0: 7801 Total time for iteration 1: 7581 Total time for iteration 2: 7491 Total time for iteration 3: 7591 Total time for iteration 4: 7581 Total time for iteration 5: 7490 java -server -Xms40m -Xmx40m ManyPeople Total time for iteration 0: 8742 Total time for iteration 1: 8192 Total time for iteration 2: 8182 Total time for iteration 3: 8191 Total time for iteration 4: 8182 Total time for iteration 5: 8192 java -server -Xms48m -Xmx48m ManyPeople Total time for iteration 0: 7962 Total time for iteration 1: 7961 Total time for iteration 2: 8012 Total time for iteration 3: 8061 Total time for iteration 4: 7922 Total time for iteration 5: 8071 java -server -Xms56m -Xmx56m ManyPeople Total time for iteration 0: 7882 Total time for iteration 1: 7661 Total time for iteration 2: 7751 Total time for iteration 3: 7761 Total time for iteration 4: 7761 Total time for iteration 5: 7701 java -server -Xms64m -Xmx64m ManyPeople Total time for iteration 0: 7951 Total time for iteration 1: 7481 Total time for iteration 2: 7290 Total time for iteration 3: 7301 Total time for iteration 4: 7441 Total time for iteration 5: 7300 Sun Hotspot Server JVM from JDK 1.4.1_02: java -server -Xms24m -Xmx24m ManyPeople Total time for iteration 0: 8352 Total time for iteration 1: 8071 Total time for iteration 2: 8102 Total time for iteration 3: 8021 Total time for iteration 4: 8072 Total time for iteration 5: 8062 java -server -Xms32m -Xmx32m ManyPeople Total time for iteration 0: 7580 Total time for iteration 1: 7491 Total time for iteration 2: 7391 Total time for iteration 3: 7511 Total time for iteration 4: 7490 Total time for iteration 5: 7391 java -server -Xms40m -Xmx40m ManyPeople Total time for iteration 0: 8482 Total time for iteration 1: 8132 Total time for iteration 2: 8122 Total time for iteration 3: 8121 Total time for iteration 4: 8112 Total time for iteration 5: 8132 java -server -Xms48m -Xmx48m ManyPeople Total time for iteration 0: 7701 Total time for iteration 1: 7571 Total time for iteration 2: 7671 Total time for iteration 3: 7771 Total time for iteration 4: 7631 Total time for iteration 5: 7801 java -server -Xms56m -Xmx56m ManyPeople Total time for iteration 0: 7651 Total time for iteration 1: 7571 Total time for iteration 2: 7661 Total time for iteration 3: 7661 Total time for iteration 4: 7681 Total time for iteration 5: 7621 java -server -Xms64m -Xmx64m ManyPeople Total time for iteration 0: 7901 Total time for iteration 1: 7571 Total time for iteration 2: 7411 Total time for iteration 3: 7420 Total time for iteration 4: 7561 Total time for iteration 5: 7411 Sun Hotspot Client JVM from JDK 1.4.1_02: java -Xms64m -Xmx64m ManyPeople Total time for iteration 0: 8322 Total time for iteration 1: 8382 Total time for iteration 2: 8362 Total time for iteration 3: 8602 Total time for iteration 4: 8432 Total time for iteration 5: 8352 (Included just to show it falls behind the server JVM for a CPU-bound test.) And now, for the bad news. If we look at the .NET CLR, being a simple JIT, it never improves over time. On the other hand, the Hotspot Server only widens its performance lead, particularly in a "server" configuration where it isn't so heap constrained: Sun Hotspot Server JVM from JDK 1.4.1_02: java -server -Xms128m -Xmx128m ManyPeople Total time for iteration 0: 6370 Total time for iteration 1: 5788 Total time for iteration 2: 5868 Total time for iteration 3: 6029 Total time for iteration 4: 5748 Total time for iteration 5: 5738 Total time for iteration 6: 5729 Total time for iteration 7: 5948 Total time for iteration 8: 5688 Total time for iteration 9: 5679 Total time for iteration 10: 5658 Total time for iteration 11: 6028 Total time for iteration 12: 5699 Total time for iteration 13: 5708 Total time for iteration 14: 5678 Total time for iteration 15: 5969 Total time for iteration 16: 5628 Total time for iteration 17: 5538 Total time for iteration 18: 5608 Total time for iteration 19: 5498 Total time for iteration 20: 5768 Total time for iteration 21: 5518 Total time for iteration 22: 5307 Total time for iteration 23: 4247 Total time for iteration 24: 4696 Total time for iteration 25: 4617 Total time for iteration 26: 4777 Total time for iteration 27: 4286 Total time for iteration 28: 4677 Total time for iteration 29: 4626 Total time for iteration 30: 4697 Total time for iteration 31: 4286 Total time for iteration 32: 4697 Total time for iteration 33: 4617 Total time for iteration 34: 4696 Total time for iteration 35: 4307 Total time for iteration 36: 4686 Total time for iteration 37: 4807 Total time for iteration 38: 4517 Total time for iteration 39: 4306 Total time for iteration 40: 4657 Total time for iteration 41: 4807 Total time for iteration 42: 4596 Total time for iteration 43: 4206 Total time for iteration 44: 4777 Total time for iteration 45: 4717 Total time for iteration 46: 4607 Total time for iteration 47: 4196 Total time for iteration 48: 4796 Total time for iteration 49: 4707 Total time for iteration 50: 4777 Total time for iteration 51: 4196 Total time for iteration 52: 4627 Total time for iteration 53: 4687 Total time for iteration 54: 4806 Total time for iteration 55: 4186 Total time for iteration 56: 4627 Total time for iteration 57: 4697 Total time for iteration 58: 4807 Total time for iteration 59: 4166 Total time for iteration 60: 4616 Total time for iteration 61: 4697 Total time for iteration 62: 4717 Total time for iteration 63: 4346 Total time for iteration 64: 4717 Total time for iteration 65: 4617 Total time for iteration 66: 4626 Total time for iteration 67: 4367 Total time for iteration 68: 4706 Total time for iteration 69: 4617 Total time for iteration 70: 4617 Total time for iteration 71: 4366 Total time for iteration 72: 4687 Total time for iteration 73: 4616 Total time for iteration 74: 4196 Total time for iteration 75: 4787 Total time for iteration 76: 4687 Total time for iteration 77: 4807 Total time for iteration 78: 4436 Total time for iteration 79: 4387 Total time for iteration 80: 4676 Total time for iteration 81: 4807 Total time for iteration 82: 4417 Total time for iteration 83: 4296 Total time for iteration 84: 4686 Total time for iteration 85: 4797 Total time for iteration 86: 4266 Total time for iteration 87: 4697 Total time for iteration 88: 4617 Total time for iteration 89: 4717 Total time for iteration 90: 4276 Total time for iteration 91: 4707 Total time for iteration 92: 4616 Total time for iteration 93: 4697 Total time for iteration 94: 4296 Total time for iteration 95: 4677 Total time for iteration 96: 4546 Total time for iteration 97: 4697 Total time for iteration 98: 4296 Total time for iteration 99: 4677 Yup, that's right. The Sun Hotspot server edition eventually widens its lead to the point where it is running almost two times as fast as .NET version 1.1! While the CLR couldn't get below 8 seconds, starting with the 23rd iteration, the Sun Hotspot server JVM never went above 5 seconds! So for applications that don't just open and close, the Hotspot JVM absolutely wipes the floor with the latest and greatest Microsoft CLR. Does it matter? You decide. But it's certainly not the myth that Rolf and Microsoft are attempting to perpetuate. Because for enterprise applications, the Microsoft .NET CLR is obviously way behind the performance capability of the modern JVMs. Unless of course Microsoft volunteers to fund my research at a university, in which case I'm sure I could come to a different conclusion ;-). Peace. (Fri May 16 14:30:44 EDT 2003/Fri May 16 14:24:36 EDT 2003)
apoc Δημοσ. 17 Μαΐου 2003 Μέλος Δημοσ. 17 Μαΐου 2003 ενταξει δεν μπορεις να βγαλεις συμπερασματα με ενα τετοιο τεστ. παρολα αυτα οπως αναφερει ο συγγραφεας εχει γινει της μοδας...τωρα τελευταια...να βγαινουν τεστ πληρωμενα μη πληρωμενα που οι εφαρμογες να ειναι tunarismeneς για συγεκριμενη πλατφορμα!Πχ το πρωτο test που εκανε η MiddleWare company (sponsored from MS) οπου βγαλανε μια .net version του PetShop χρησιμοποιουσε stored Procedures στην βαση ..και ειχε επιδοσεις παρα πολυ καλες σε εκεινο το κομματι σε σχεση με το Java PetShop το οποιο ηταν απλα ενα reference implementation για το j2ee! Στην συνεχεια πειρε τον λογο η Oracle.. με ενα δικο της test ...και φυσικα εβγαζε την Java πιο γρηγορη, καπου στην μεση μπλεχτηκε και η IBM η οποια ομολγω τον τελευταιο καιρο ειναι μια διχασμενη προσωπικοτητα! 1. Ειναι με την MS ,οι ανταρτες των Web Services με το να αποχωρθσουν απ το w3c και να δωσουν τα δικα τους προτοκολα 2.απο την αλλη ειναι μια απο τις κινητηριες δυναμεις πισω απο την Java..με παραδοσιακες σχεσεις με το Apache Foundation, το eclipse project κτλ κτλ Συντομα η δευτερη εκδοση του J2ee vs .Net της Middleware θα βγει..υποσχοντε να εναι εινα πιο προσεκτικοι και λιγοτερο..sponsored <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/wink.gif" alt="" /> <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/grin.gif" alt="" />
Γηρυόνης Δημοσ. 17 Μαΐου 2003 Δημοσ. 17 Μαΐου 2003 Χεχε κορυφαίο... Ας περιμένουμε μέχρι να βγει ο "τίγρης" για να έχουμε generics και να μειώσουμε castings και να δούνε μερικοί πόσο πιο γρήγορη θα είναι η τελευταία JVM..
random Δημοσ. 18 Μαΐου 2003 Δημοσ. 18 Μαΐου 2003 Ειναι η java ενα εκατομμύριο φορές γρηγορότερη απο όλους; Java is by far the fastest computer language ever invented. Im not talking 10% faster <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/mad.gif" alt="" /> . Im not talking 50% faster. <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/blush.gif" alt="" /> Im talking hundreds of times faster <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/tongue.gif" alt="" /> than any other language <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/confused.gif" alt="" /> . This is hugely simple <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/grin.gif" alt="" /> to demonstrate, with a test anyone can perform on any machine.... <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/cool.gif" alt="" /> http://www.javaperformancetuning.com/news/qotm028.shtml
damn3 Δημοσ. 19 Μαΐου 2003 Δημοσ. 19 Μαΐου 2003 random said: Ειναι η java ενα εκατομμύριο φορές γρηγορότερη απο όλους; Java is by far the fastest computer language ever invented. Im not talking 10% faster <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/mad.gif" alt="" /> . Im not talking 50% faster. <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/blush.gif" alt="" /> Im talking hundreds of times faster <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/tongue.gif" alt="" /> than any other language <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/confused.gif" alt="" /> . This is hugely simple <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/grin.gif" alt="" /> to demonstrate, with a test anyone can perform on any machine.... <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/cool.gif" alt="" /> http://www.javaperformancetuning.com/news/qotm028.shtml Κάτι πρέπει να ξέχασε ο τύπος να γράψει... Κάποιος που έχει java, c#, c/c++ compilers και perl parser ας γράψει τα παραδείγματα που δίχνει ο τύπος χωρίς empty loops και να μου στείλει τα αποτελέσματα plzzz.
apoc Δημοσ. 19 Μαΐου 2003 Μέλος Δημοσ. 19 Μαΐου 2003 για Non empty δες πανω! Ο τυπος εχει κανει πουστια...για οποιον την εχει δει.. να το παρει το ποταμι? (βεβαια δεν ξερω αν μπορεις να το θεωρησεις πουστια..παρολα αυτα ειναι ενα πλεονεκτημα του VM). <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/grin.gif" alt="" />
damn3 Δημοσ. 19 Μαΐου 2003 Δημοσ. 19 Μαΐου 2003 Γι αυτό λέω πως κάτι πρέπει να ξέχασε... <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/smile.gif" alt="" /> ελπίζω να μην το έκανε σκόπιμα.
apoc Δημοσ. 19 Μαΐου 2003 Μέλος Δημοσ. 19 Μαΐου 2003 οχι δεν εχει ξεχασει τιποτα! οι κωδικες ειναι μια χαρα! αλλου ειναι το κολπο! edit: εκτος αν εννοεις οτι εχει ξεχασει να αναφερει αυτο το μικρο σημειο! <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/grin.gif" alt="" />
apoc Δημοσ. 19 Μαΐου 2003 Μέλος Δημοσ. 19 Μαΐου 2003 ναι..βασικα το κολπο δεν γινεται στον κωδικα.. αμα προσεξεις λοιπον ...το statement που χρησιμοποιει για να τρεξει τον κωδικα της Java! > java -server Loop λοιπον το κολπο ειναι οτι αυτος καλει το Java Virtual Μαchine να τρεξει με διαφορετικο mode! Το VM εχει 2 βασικα Mode. To client και το server. Το Server Μοde εκτος απο τις διαφορες στην ποσοτητα μνημης που καταλαμβανει για να υποστηριξει βαριες εφαγμογες κτλ κτλ. Χρησiμοποιει εναν πολυ εξυπνο (τουλαχιστον ετσι φαινεται) profiler του Bytecode. Ουσιαστικα αυτο που κανει ειναι αφου παρει τον bytecode Που εχει ειδη περασει ενα σταδιο optimizations οπως καθε σοβαρος compιler κανει, κανει ενα δευτερου ειδους compilation θα λεγαμε κατα την εκτελεση,.και προσπαθει να αναλυσει τον κωδικα.,για τυχον προβληματα..και κωδικες οπως ο παραπανω! Προφανως ο optimizer η Profiler οπως θες πες τον..καταλαβαινει τι μαλακια παιζε στα 2 loop και αποφασιζει την πιο συντομη εκτελεση!! Εδω να πουμε οτι ...οι γλωσσες οπως η C, C++ δεν εχουν τετοια προνομια..υποθετω ουτε και η perl (δεν ξερω αν ο interpreter της ειναι τοσο εξυπνος) . Γιατι c, C++ παρολο που ερχοντε με πολυ εξυπνους compiler οσο αναφορα το optimization του κωδικα..μετα δεν υπαρχει αλλο σταδιο αναλυσης..κατα την εκτελεση..οποως υπαρχει στο Virtual Machine! Υποθετω οτι η C# Μπορει να εχει ..η ακομα (να μην εχει)παρομοιες μαγκιες..παρολα αυτα επειδη η αρχιτεκτονικη της ειναι ιδια..(VM/Bytecode/assemblies) ειναι σιγουρο οτι υπαρχουν οι βασεις! Ενα απο τα καλα λοιπον του Virtual Machine!Το οποιο πιστευω ειδικα για την Java συντομα θα δουμε μεγαλες αλλαγες..παρομοιες με εκεινες του 1.2 -> 1.3 Παραθετω παρακατω την παραγραφο που δινει περιληπτικα την απαντηση --------------------------------------------------------- Adaptive compiler - The Java HotSpot Server VM launches an application using a standard interpreter, but then analyzes the code as it runs to detect performance bottlenecks, or "hot spots". It compiles those performance-critical portions of the code for a boost in performance, while avoiding unnecessary compilation of seldom-used code (most of the program). The Java HotSpot Server VM also uses the adaptive compiler to decide, on the fly, how best to optimize compiled code with techniques such as in-lining. The runtime analysis performed by the compiler allows it to eliminate guesswork in determining which optimizations will yield the largest performance benefit. --------------------------------------------------------- Link http://java.sun.com/products/hotspot/2.0/README.html
apoc Δημοσ. 22 Μαΐου 2003 Μέλος Δημοσ. 22 Μαΐου 2003 Η Μιcrosoft μαλλον δεν μπορει να φιαξει ουτε μια secure γλωσσα! Διαβαστε παρακαλω..Accessing private members? <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/grin.gif" alt="" /> Αχ..να υποθεσω θα εχουμε καποιο patch! xaxaxaax! http://books.slashdot.org/books/03/05/20/1640225.shtml?tid=
apoc Δημοσ. 22 Μαΐου 2003 Μέλος Δημοσ. 22 Μαΐου 2003 για διαβαστε εδω ενα πολυ ωραιο comparison..Με πραγματικα μπολικο computation!Δειτε το προτελευταιο post Tuesday May 20, 2003 <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/smile.gif" alt="" /> http://www.freeroller.net/page/ceperez
Προτεινόμενες αναρτήσεις
Αρχειοθετημένο
Αυτό το θέμα έχει αρχειοθετηθεί και είναι κλειστό για περαιτέρω απαντήσεις.