> >

Real Pi Benchmark下载

Real Pi Benchmark

Real Pi Benchmark

3250 人安装 0 人喜欢 0 人评论

Real Pi Benchmark 截图

Real Pi Benchmark Real Pi Benchmark Real Pi Benchmark Real Pi Benchmark

Real Pi Benchmark 描述

RealPi provides some of the best and most interesting Pi calculation algorithms out there. This app is a benchmark which tests your Android device's CPU and memory performance. It calculates the value of Pi to the number of decimal places you specify. You can view and search for patterns in the resulting digits to find your birthday in Pi or find famous digit sequences like the "Feynman Point" (six 9's in a row at the 762nd digit position). There are no hard limits on the number of digits, if you experience a freeze please see "Warnings" below.
Leave comments with your Pi calculation time on the AGM+FFT formula for 1 million digits. Also the most digits you can calculate, which tests your phone's memory. The author's Huawei Ascend P1 takes 25 sec for 1 million and can do at most 33 million digits. Note that the AGM+FFT algorithm works in powers of 2, so calculating 10 million digits takes just as much time and memory as 16 million digits (the internal precision is shown in the output). On multi-core processors RealPi tests the performance of a single core. For accurate benchmark timing ensure that no other applications are running and your phone is not hot enough to throttle the CPU.
Search function:
Use this to find patterns in Pi like your birthday. For best results calculate at least one million digits using the AGM + FFT formula, then select the "Search for Patterns" menu option.
Here's a summary of the available algorithms:
-AGM + FFT formula (Arithmetic Geometric Mean): This is one of the fastest available methods to calculate Pi, and is the default formula used by RealPi when you press "Start". It runs as native C++ code and is based on Takuya Ooura's pi_fftc6 program. For many millions of digits it can require a lot of memory, which often becomes the limiting factor in how many digits you can calculate.
-Machin's formula: This formula was discovered by John Machin in 1706. It's not nearly as fast as AGM + FFT, but shows you all the digits of Pi accumulating in real time as the calculation proceeds. Choose this formula in the settings menu and then press "Start". It's written in Java using the BigDecimal class. You should probably not ask it to compute much more than 10000 digits.
-Nth digit of Pi formula by Gourdon: This formula shows that it's possible (surprisingly) to calculate decimal digits of Pi "in the middle" without calculating the preceding digits, and needs very little memory. When you press the "Nth Digit" button RealPi determines 9 digits of Pi ending with the digit position you specify. It runs as native C++ code and is based on Xavier Gourdon's pidec program. Although it's faster than Machin's formula it can't beat the AGM + FFT formula in speed.
-Nth digit of Pi formula by Bellard: Gourdon's algorithm for the Nth digit of Pi can't be used for the first 50 digits, so this formula by Fabrice Bellard is used instead if digits < 50.
Permissions:
If you enable the "Calculate when in sleep" option RealPi will keep calculating while your screen is off, useful when calculating many digits of Pi. While not calculating or after the calculation finishes your device will go into deep sleep as usual.
Warnings:
This app can drain your battery quickly when doing a long calculation, especially if the "Calculate when in sleep" option is on.
Calculation speed depends on your device's CPU speed and memory. At very large numbers of digits RealPi may terminate unexpectedly or not produce an answer. It could also take a very long time to run (years). This is due to the large amount of memory and/or CPU time needed. The upper limit on the number of digits you can calculate depends on your Android device.
Changes to the "Calculate when in sleep" option take effect for the next Pi calculation, not in the middle of a calculation.
RealPi提供了一些最好的和最有趣的PI运算的算法在那里。这个程序是一个基准测试,测试你的Andr​​oid设备的CPU和内存性能。它计算圆周率至您指定的小数位数的值。你可以(在第762位的六个方位9的一排)查看和搜索模式在由此产生的数字找到淠你的生日或找到像“费曼点”著名数字序列。如果您遇到冻结,请参阅“警告”下面有关于数字的数量没有硬性限制。
留下您的丕计算时间上的AGM + FFT公式1万位的意见。也是最数字可以计算,测试你的手机的内存。笔者的华为Ascend P1采用25秒100万,可以做的至多33万位。需要注意的是AGM + FFT算法的工作以2的幂,所以计算千万的数字需要同样多的时间和内存为1600万个数字(内部高精度显示在输出)。在多核处理器RealPi测试一个单核的性能。为了获得准确的基准时间确保没有其他应用程序正在运行,你的手机是不够热油门的CPU。
搜索功能:
使用此发现淠模式,如您的生日。为了达到最佳效果计算至少100万使用AGM + FFT式的数字,然后选择“搜索模式”菜单选项。
下面是可用算法的摘要:
 -AGM + FFT公式(算术几何平均值):这是最快的方法计算出圆周率之一,是由RealPi使用时按下“开始”的默认公式。它运行原生C ++代码,并基于木村拓哉Ooura的pi_fftc6计划。对于数以百万计的数字它可能需要大量的内存,这往往成为你能有多少位计算的限制因素。
 -Machin的公式:这个公式是在1706年发现的由约翰·梅钦这不是几乎一样快AGM + FFT,但显示你的Pi积累的所有实时为计算所得的数字。选择此公式的设置菜单,然后按下“开始”。它使用BigDecimal类用Java编写的。你可能不应该要求它来计算远远超过10000位。
 皮式由古尔的-Nth位:该公式表明这是可能的(奇怪)为“中间”十进制计算圆周率数字不计算前面的数字,并且需要很少的内存。当您按下“第N位”按钮RealPi决定9丕数字与您指定的数字位置结束。它运行原生C ++代码,并基于泽维尔古尔的PIDEC计划。虽然它比梅钦公式更快的不能击败速度股东周年大会+ FFT公式。
 不能用于第一50个数字古尔的算法为Pi的第N位,因此该公式由法布里斯·贝拉是用来代替如果数字<50:裨式由贝拉德的-Nth数字。
权限:
如果启用了“计算在睡眠”选项RealPi将继续计算,而计算的许多圆周率位数时,你的屏幕是关闭的,有益的。虽然没有计算或之后完成计算设备将进入深度睡眠如常。
警告:
这个程序可以迅速耗尽你的电池做了长时间的计算时,特别是如果“计算在睡眠”选项打开。
计算速度取决于设备的CPU速度和内存。在非常大的数的数字RealPi可能会意外或不终止产生一个答案。它也可能需要很长的时间来运行(年)。这是由于需要大量的存储器和/或CPU时间。对数字可以计算出数量的上限取决于你的Andr​​oid设备上。
改变到“计算当在睡眠”选项生效为下裨计算,而不是在一个计算的中间。

Real Pi Benchmark 更新内容

1.1 2014-04-30
-Updated to use new theme, add action bar
-Enabled Move to SD
-Added warnings when Machin or Gourdon formula will take a long time to run
-Removed support for Cupcake, Donut
Pi music may be coming one day in a future version of this app! Pi fanatics check out this song composed by Michael Blake based on Tau (2Pi) www.youtube.com/watch?v=3174T-3-59Q

Real Pi Benchmark 历史版本

Real Pi Benchmark 相关攻略

Real Pi Benchmark 应用内最新内容

Real Pi Benchmark 信息

大小
1.11M
分类
休闲时间
TAG
更新
版本
1.1
要求
Android 2.1.x 以上
查看权限要求
来自
360手机助手

下载Real Pi Benchmark的人还下载

游戏下载排行榜

  1. 神庙逃亡2盔甲勇士 5721 万人安装 下载
  2. 捕鱼达人 3502 万人安装 下载
  3. 水果忍者免费版 3001 万人安装 下载
  4. 地铁跑酷 3522 万人安装 下载
  5. 水果忍者国际版 2682 万人安装 下载
  6. 会说话的汤姆猫 2 1806 万人安装 下载
  7. 植物大战僵尸2高清版 1223 万人安装 下载
  8. 捕鱼达人2 2346 万人安装 下载
  9. 极限摩托 1039 万人安装 下载
  10. 保卫萝卜 2612 万人安装 下载
豌豆荚安卓版二维码

扫一扫安装
豌豆荚安卓客户端