imac performance comparison

partition_by1 is a 32-length varchar type for retrieval. The remaining two fields are floating-point numbers and are mostly used for sorting; Autokid is used as the sub-column and serves as the primary key. it is used only for atomicity guarantee during data loading and has no practical significance. 2. purpose: Compressed space comparison The larger the compression ratio, the smaller the disk space occupied, directly reducing the data storage co

* * #include The results are as follows:[email protected]:~/test$./boost_regex_main used: msmatched 10000 timesThis result, unexpectedly 40 times times faster than C, and this is in the pattern string can match the target string under the premise, if the test does not match the situation, the boost is 4,000 times times faster than C, I can not believe this result, paste the test with the pattern character and the target character, see if there are people like me, Or for other reasons, such as

provide a better performance experience. To this end, we have prepared a comparison between the SUSE Linux Enterprise 12 operating system and RedHat Enterprise Linux 7.0. I believe this will help you understand the performance of the new system. The new version of the operating system we tested this time is the Server version. This new product makes breakthr

Comparison of Java toString Performance Optimization Solutions Who cares about toString performance? No one! Unless you have a large amount of data in batch processing, using toString produces a lot of logs. Then, when you investigate why it is so slow, you will realize that most toString methods use introspection, which can be optimized. However, let's take a l

programPackage Learning.multithread.collection;import Java.util.arraylist;import Java.util.collections;import Java.util.hashmap;import Java.util.list;import Java.util.map;import Java.util.treemap;import Java.util.concurrent.concurrenthashmap;import java.util.concurrent.concurrentskiplistmap;/** * set-xms1024m to Avoid JVM heap size increase during the test */public class Concurrentmaptest {private static final int thread_num = 8; private static final int map_size = 1000000; public sta

interesting comparison, in order to keep "compatibility" with my previous tests, I first tested the TPS (Transactions/sec) and then the QPS (Query/sec), which I prefer.The first test is the classic Sysbench Oltp_ro (Read only):sysbench Oltp_ro:Next is the same Oltp_ro test, but the open and close operation of the table is not performed in the transaction (see here for a complete explanation)sysbench Oltp_ro-trx:Next is "Point-selects", which is a way

JavaScript three array Copy method performance comparison, for WebKit, the use of concat; Other browsers, using slice.I. Three methods of array replication1. By Slicevar arr = [1, 2, 3], Copyarr;Copyarr = Arr.slice ();2. By concatvar arr = [1, 2, 3], Copyarr;Copyarr = Arr.concat ();3. By Loopvar arr = [1, 2, 3], Copyarr = [];For (var i=0, j=arr.length; iTwo. Test environmentBrowser: ie6+, FF 3.5.5, Opera, C

js| comparison STRUTS/TAPESTRY/JSF is a framework technique for the new and old combination of the present Java EE Performance layer. From the time of birth, struts should be relatively early, use very widely, Tapestry 3.0 gradually aroused widespread attention, just as Tapestry is about to show off, Sun introduced JSF standard technology, although the JSF first launched is not mature, set aside a period of

Let's take a closer look at the performance comparison between the Canon eos m camera and the Nikon D5200 camera.Analysis and sharing:The Canon eos m uses a 3 inch 1.04 million pixel touch screen, and the LCD monitor on the back uses a touch panel, which allows you to perform multiple settings through touch operations and select features and release shutter during shooting.The body size is 108.6x66.5x32

Let's give a detailed analysis of the performance comparison between the Canon 6D camera and the Canon 7D camera.Analysis and sharing:Canon 6D uses a 3.0 inch 1.04 million pixel rotary type ii tft LCD screen with a maximum horizontal angle of about 175 ° and a vertical downward angle of about 90 °, the maximum upward rotation angle is about 180 °, and the screen resolution is 720 × 480 pixel

To the photographic enthusiasts to share a detailed analysis of Canon 5Ds and Canon 60D performance comparison. Analytical sharing: The brightest part of Canon 5DS is the sensor, and the EOS 5DS 50.6 million-pixel full frame sensor is a shock to everyone. What is the concept of 50 million pixel level? Before the pretty scenery of the medium-format CMOS sensor is just 51.4 million pixels, the new C

Continuation, A*,dijkstra, performance comparison of bidirectional BFS algorithm and application of A * algorithm Author: July March 10, 2011.Source: Http://blog.csdn.net/v_JULY_v-------------------------------------------------- Introduction:The shortest path algorithm a * algorithm ,Dijkstra algorithm ,BFS algorithm , has been described in this blog. Among them,Dijkstra algorithm , and then wrote an artic

technical friends of the discussion, for the comparison of the question here to do a description.We know that Redis is a memory database, and MongoDB is not, so there are friends who question whether the comparison here is just memory versus disk. In fact, this argument is justified, the above test data from the original author's article, and its article does not mention whether MongoDB is in memory. Accor

results. Compare compare accounts x Tools matrix］ConclusionObviously, the preferred all-rounder is Gatling, and the concurrency model of the Akka actor is the originator of Erlang from the concurrency language.If you want to expand the performance testing tool yourself, then locust this small and fine tool can be considered.Ngrinder tool is the Korean version of Line Open source, and has opened a Chinese forum, by South Korean engineers to answe

threads, and asynchronous non-blocking calls in multiple environments, and have the opportunity to continue to improve. You have not previously seen a performance comparison of RPC calls based on HTTP/2, which should theoretically be lower than the classic port-based RPC scenario. This test results can be a simple proof of this conjecture. Thrift's data is far ahead. Grpc is still in development, based

Search Easy loans, more money, Li-Tak wealth with the same peer site, but also for their own research and development site.Below from the aesthetic design, architecture design, performance security design to understand the nextBeautiful Design : The general netizen from the skin to observe, will feel that the search easy loan is superior to the back 2, well, as the majority of professionals will also think so, but professional people also have such ex

be used when the key is int, the note is int rather than integer, which is also a point of sparsearray efficiency improvement, The boxed operation was removed!.Because the key is int also does not need what hash value, as long as the int value equal, that is the same object, simple and rough. Insert and search is also based on the second Division, so the principle and arraymap basically consistent, here is not much to say.To sum up: space contrast, with hashmap, remove the hash value of the sto

[tempdb]. [dbo]. [Table]. [G] End end End End end(5) Performance comparison of Coalesce and IsNullLet's run the following queryDBCC dropcleanbuffers;declare @a VARCHAR (5), -- ='str_a', -- ThisLine changed per Test @b VARCHAR (5), -- ='Str_b', -- ThisLine changed per Test @v VARCHAR (5), @x INT=0, @time DATETIME2 (7) =Sysdatetime (); While @x500000BEGIN SET @v= COALESCE (@a, @b); --COALESCE SET @x+=1; En

First, we need to know the basic principles of the Performance Comparison of the routing technology. Q: exchange network routing technology. A: exchange is the development direction of network technology. The routing technology is an important part of the exchange network. The correct choice of Routing Technology in the exchange network will directly affect the overall