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How Badoo saved one million dollars switching to PHP7

How Badoo saved one million dollars switching to PHP7 By Badoo on 14 Mar 2016 - 9 Comments PHP Introduction...adjust the app cluster processing load more than justifies itself from the economic standpoint (by a million...With over three million lines of PHP code and 60,000 tests, this project took on epic proportions....came up with a new PHP app testing framework (which, by the way, is already open source), and saved a million...字数有限制，原文： https://techblog.badoo.com/blog/2016/03/14/how-badoo-saved-one-million-dollars-switching-to-php7

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Next.js 15的缓存、Rust和AI提升薪资，以及 Million.js

Vercel 对 Next.js 和缓存的最终目标，以及 Rust、Go 和 JavaScript 技能如何为 AI 工作增添价值，以及对 Million.js 的回顾。...译自 Next.js 15 Cache, Rust Adds to AI Salaries, and Million.js，作者 Loraine Lawson。...了解 Million.js，一个极简的 JS 编译器 Million.js 是一个开源的 JavaScript 编译器，它采用极简主义的方法。...但本周我们发现了一篇由程序员和 LogRocket 技术作家 Isaac Okoro 撰写的关于 Million.js 的深入评论。...Million 的方法减少了内存使用，提高了渲染速度和性能，而不会牺牲灵活性。”

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Unity基础教程系列(新)（五）——计算着色器（Rendering One Million Cubes）

这是关于学习使用Unity的基础知识的系列文章中的第五篇。这次，我们将使用计算着色器显著提高图形的分辨率。

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基因组中的趣事（二）- 最长的基因2.7 million，最短的基因只有8 nt却能编码

ENSG00000237235 TRDD2 TR_D_gene 9 ENSG00000223997 TRDD1 TR_D_gene 8 可变剪接调控基因RBFOX1以2.7 million...CTBP2P1和CCNQP2相距最远，距离有30个million。这是两个pseudogene。

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Shenzhen Catic Real Estate to raise RMB 2.2 bln

China – Shenzhen Catic Real Estate Co Ltd announced today that it plans to issue up to 260 million...CATIC International Holdings Ltd will subscribe up to 120 million shares for RMB 1 billion in cash...In Addition, Shenzhen Catic Real Estate will issue up to 140 million shares worth RMB 1.2 billion to...and half to repay a loan of RMB 600 million....RMB 700 million of the proceeds will be used for the development of three properties, and RMB 300 million

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如何编写更好的SQL查询：终极指南-第二部分

要做到这一点，你需要开始使用两个表： one_million 和 half_million 来做一些示例。...ANALYZE one_million; EXPLAIN SELECT * FROM one_million; QUERY PLAN __________________________________...还有一些其它算法的示例： EXPLAIN ANALYZE SELECT * FROM one_million JOIN half_million ON (one_million.counter=half_million.counter...ANALYZE SELECT * FROM one_million JOIN half_million ON (one_million.counter=half_million.counter); QUERY...= half_million.counter) -> Index Scan using one_million_counter_idx on one_million (cost=0.00

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Counts FPKM RPKM TPM CPM 的转化

reads，并将该数字除以1,000,000——这是我们的“每百万”缩放因子 ( “per million” scaling factor ) 。...消除测序深度影响，得到每百万reads（RPM, reads per million ）将RPM值除以基因长度（以千碱基为单位），消除基因长度影响，得到RPKM。...FPKM FPKM (Fragments Per Kilobase Million, or Fragments Per Kilobase of transcript per Million reads...TPM TPM (Transcripts Per Million, or Transcripts Per kilobase of exon model per Million mapped reads)...CPM CPM（Counts Per Million, or Counts of exon model Per Million mapped reads）每百万映射读取的counts 除了RPKM、

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clickhouse 亿级数据性能测试

Processed 91.01 million rows, 728.06 MB (375.91 million rows/s., 3.01 GB/s.)...Processed 7.75 million rows, 61.96 MB (191.44 million rows/s., 1.53 GB/s.)...Processed 600.04 million rows, 6.20 GB (70.11 million rows/s., 725.04 MB/s.)...Processed 600.04 million rows, 5.60 GB (482.97 million rows/s., 4.51 GB/s.)...Processed 546.67 million rows, 5.48 GB (154.72 million rows/s., 1.55 GB/s.)

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sqlzoo练习2

continent, population FROM world Show the name for the countries that have a population of at least 200 million.... 200 million is 200000000, there are eight zeros....Million：6个0 Billion：8个0 SELECT name FROM world WHERE population > 200000000; 关于人均GDP Give the name and...sq km or it has a population of more than 250 million....Show the countries that are big by area (more than 3 million) or big by population (more than 250 million

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6亿数据秒级查询，ClickHouse太快了！

Processed 91.01 million rows, 728.06 MB (375.91 million rows/s., 3.01 GB/s.)...Processed 600.04 million rows, 6.20 GB (70.11 million rows/s., 725.04 MB/s.)...Processed 600.04 million rows, 5.60 GB (482.97 million rows/s., 4.51 GB/s.)...Processed 546.67 million rows, 5.48 GB (154.72 million rows/s., 1.55 GB/s.)...Processed 546.67 million rows, 5.56 GB (546.59 million rows/s., 5.56 GB/s.)

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不同的坐标轴转换绘制世界地图

read.csv(p,stringsAsFactors=FALSE) #这里读取的就是我们上面的population.csv names(mydata)[1]million...","fan" ) #重新定义列明，并在原基础上新加了million和fan列 mydata$million<-mydata$Scale/1000000 mydata$fanmillion, breaks=c(min(mydata$million,na.rm=TRUE), 0,300,600,900,1200,1500,1800,2100,2400..., max(mydata$million,na.rm=TRUE)), labels=c(" <=0","0~300","..."albers", parameters = c(0, 0))+ scale_y_continuous(breaks=(-3:3)*30) + scale_fill_manual(name="million

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印尼投资平台Ajaib获得由Horizons Venture和Alpha JWC领投的2500万美元A轮融资

runs the fifth-largest stock brokerage in Indonesia by number of trades, announced it has raised a $25 million...Piyajomkwan, Ajaib Group focuses on millennials and first-time investors, and currently claims one million...It has now raised a total of $27 million, including a $2 million seed round in 2019....Stock investment has a very low penetration rate in Indonesia, with only about 1.6 million capital market...Last week, Indonesian investment app Bibit announced a $30 million growth round led by Sequoia Capital

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统计测序数据reads数和碱基数的几种方法

cat sample.fq | awk 'BEGIN{OFS="\t"}{if(FNR%4==0) base+=length}END{print FNR/4/1000000 " million", base.../10^9 "G";}' # 3e-06 million 1.41e-07 G # 统计多个文件 for i in *.fq; do cat sample.fq | awk -v name=${...i} 'BEGIN{OFS="\t"}{if(FNR%4==0) base+=length}END{print name, FNR/4/1000000 " million", base/10^9 " G...";}' done # sample.fq 3e-06 million 1.41e-07 G # 统计多个压缩文件 for i in *.fq.gz; do zcat sample.fq.gz...| awk -v name=${i} 'BEGIN{OFS="\t"}{if(FNR%4==0) base+=length}END{print name, FNR/4/1000000 " million

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搞定系统设计 02：估算的一些方法

2 的次幂 2的次幂英语里面常讲 1 个 Million，1 个 Billion，分别是百万、十亿的意思。可以看到，以 3 个 0 为一组，层层递进。...先给出了一些预设： 300 个 million 的月活跃用户 50% 的用户每天都使用 twitter 用户平均每天发表 2 条 tweets 10% 的 tweets 包含多媒体多媒体数据保存 5...年下面是估算的过程：先预估 QPS： DAU（每天的活跃用户数，Daily Active Users）为：300 million（总用户数） * 50% = 150 million 发 tweets...再来估算存储容量：假设多媒体的平均大小为 1MB，那么每天的存储容量为：150 million * 2 * 10% * 1MB = 30 TB。...最后这两个的估算过程是这样的： 300 个 million * 10%* 1MB，1 MB 其实就是 6 个 0，相当于 million 要进化 2 次：million -> billion -> trillion

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Leetcode solution 1036: Escape a Large Maze

baozitraining/p/10945962.html B 站: https://www.bilibili.com/video/av53975943 Problem Statement In a 1 million...by 1 million grid, the coordinates of each grid square are (x, y) with 0 1B, 1 Million * 1 Million = 1TB, OMG, immediately using a set instead...., ONE_MILLION, blockLookup, visited)) { 35 String nextKey = nextX + "," + nextY;..., ONE_MILLION, blockLookup, visited)) { 54 String nextKey = nextX + "," + nextY;

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Go语言基准测试(benchmark)三部曲之二：内存篇

= 1000000 // 往切片中添加数据的长度，百万 SLICE_LENGTH_TEN_MILLION = 10000000 // 往切片中添加数据的长度，千万 SLICE_LENGTH_HUNDRED_MILLION...BenchmarkNewSliceWithCap(b *testing.B) { for n := 0; n < b.N; n++ { newSliceWithCap(SLICE_LENGTH_MILLION..., b) } func BenchmarkNewSlicTenMillion(b *testing.B) { testNewSlice(SLICE_LENGTH_TEN_MILLION, b) }...func BenchmarkNewSlicHundredMillion(b *testing.B) { testNewSlice(SLICE_LENGTH_HUNDRED_MILLION, b) }...执行以下命令测试，只会匹配到上面新增的三个测试方法 go test -bench='Million$' -benchmem .

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利用JIT提升ClickHouse数十倍查询性能

Processed 10.02 million rows, 80.18 MB (180.95 million rows/s., 1.45 GB/s.)...Processed 10.02 million rows, 80.18 MB (630.94 million rows/s., 5.05 GB/s.)...对比上面上次查询的效率: 开启 JIT 是 (630.94 million rows/s., 5.05 GB/s.)...关闭 JIT 是 (180.95 million rows/s., 1.45 GB/s.) 两者相差 3.5 倍，提效确实很明显。

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基于Clickhouse的日志体系

Processed 2.65 million rows, 81.69 MB (49.55 million rows/s., 1.53 GB/s.)...Processed 83.72 million rows, 10.98 GB (31.45 million rows/s., 4.12 GB/s.)...Processed 27.31 million rows, 2.14 GB (37.74 million rows/s., 2.95 GB/s.)...Processed 25.48 million rows, 1.79 GB (41.68 million rows/s., 2.93 GB/s.)...Processed 27.62 million rows, 3.21 GB (20.26 million rows/s., 2.35 GB/s.)

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ClickHouse复合主键调优技巧

Processed 16.38 thousand rows, 188.42 KB (2.60 million rows/s., 29.87 MB/s.)...Processed 4.10 million rows, 56.53 MB (157.82 million rows/s., 2.17 GB/s.)...Processed 50.00 million rows, 838.89 MB (334.89 million rows/s., 5.62 GB/s.)...Processed 50.00 million rows, 589.10 MB (622.05 million rows/s., 7.33 GB/s.) 这是为什么呢？

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F5以5亿美元的价格收购Volterra多云管理初创公司

company F5 announced today that it is acquiring Volterra, a multi-cloud management startup, for $500 million...That breaks down to $440 million in cash and $60 million in deferred and unvested incentive compensation...Volterra emerged in 2019 with a $50 million investment from multiple sources, including Khosla Ventures

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How Badoo saved one million dollars switching to PHP7

Next.js 15的缓存、Rust和AI提升薪资，以及 Million.js

Unity基础教程系列(新)（五）——计算着色器（Rendering One Million Cubes）

基因组中的趣事（二）- 最长的基因2.7 million，最短的基因只有8 nt却能编码

Shenzhen Catic Real Estate to raise RMB 2.2 bln

如何编写更好的SQL查询：终极指南-第二部分

Counts FPKM RPKM TPM CPM 的转化

clickhouse 亿级数据性能测试

sqlzoo练习2

6亿数据秒级查询，ClickHouse太快了！

不同的坐标轴转换绘制世界地图

印尼投资平台Ajaib获得由Horizons Venture和Alpha JWC领投的2500万美元A轮融资

统计测序数据reads数和碱基数的几种方法

搞定系统设计 02：估算的一些方法

Leetcode solution 1036: Escape a Large Maze

Go语言基准测试(benchmark)三部曲之二：内存篇

利用JIT提升ClickHouse数十倍查询性能

基于Clickhouse的日志体系

ClickHouse复合主键调优技巧

F5以5亿美元的价格收购Volterra多云管理初创公司

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