java - Apache Http 客户端比浏览器慢

Question

免责声明:我知道这个问题有重复项(one、two、three)，但是:

• 我尝试了所有的答案，但都没有解决问题(我不仅在 SO 中搜索)
• 我提供了 http 客户端的完整内部日志，所以有经验的用户可以对其进行分析和评论。
• 那些问题是旧的(一年多了)，很多东西都变了。

---

我正在尝试从此 URL 获取内容: https://api.vk.com/method/database.getCountries

Mac OS Chrome 浏览器在 70-100 毫秒内获取内容(我查看开发工具的“网络”选项卡)，但我使用 apache http 客户端 4.5.2 的代码在 内获取内容180-200 毫秒。我还有一个带有 ( kevinsawicki-http-request) 库的代码，女巫在 70-100 毫秒内获取此页面(就像在浏览器中一样)。这种差异对我和(我认为)许多提出类似问题的其他开发者来说至关重要。

我的代码:

RequestConfig requestConfig = RequestConfig.custom()
        .setCookieSpec(CookieSpecs.IGNORE_COOKIES)
        .setSocketTimeout(60000)
        .setConnectTimeout(5000)
        .setConnectionRequestTimeout(5000)
        .build();
SocketConfig socketConfig = SocketConfig.custom()
        .setSoKeepAlive(false) //true - no differences in request time
        .setTcpNoDelay(true)
        .build();
PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager();
connManager.setMaxTotal(50);
connManager.setDefaultMaxPerRoute(2);

CloseableHttpClient httpClient = HttpClients.custom()
        .setDefaultSocketConfig(socketConfig)
        .setConnectionManager(connManager)
        .setDefaultRequestConfig(requestConfig)
        .setUserAgent("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36")
        .build();

//1
long t11 = System.currentTimeMillis();
try(CloseableHttpResponse response1 = httpClient.execute(new HttpGet("https://api.vk.com/method/database.getCountries"))) {
    code1 = response1.getStatusLine().getStatusCode();
}
long t12 = System.currentTimeMillis();
long reqTime1 = t12 - t11;
//2
long t21 = System.currentTimeMillis();
try(CloseableHttpResponse response2 = httpClient.execute(new HttpGet("https://api.vk.com/method/database.getCountries"))) {
    code2 = response2.getStatusLine().getStatusCode();
}
long t22 = System.currentTimeMillis();
long reqTime2 = t22 - t21;
//3
long t31 = System.currentTimeMillis();
try(CloseableHttpResponse response3 = httpClient.execute(new HttpGet("https://api.vk.com/method/database.getCountries"))) {
    code3 = response3.getStatusLine().getStatusCode();
}
long t32 = System.currentTimeMillis();
long reqTime3 = t32 - t31;

log.trace("reqTime1: {}", reqTime1);
log.trace("reqTime2: {}", reqTime2);
log.trace("reqTime3: {}", reqTime3);

这打印:

reqTime1: 198 
reqTime2: 168 
reqTime3: 160

(所有 3 个请求都返回 200 个 http 代码)

我有 JVM 选项:

-Djavax.net.ssl.keyStore=/path/to/my/keyStore.jks
-Djavax.net.ssl.keyStorePassword=my_password
-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.SimpleLog
-Dorg.apache.commons.logging.simplelog.showdatetime=true
-Dorg.apache.commons.logging.simplelog.log.org.apache.http=DEBUG
-Dorg.apache.commons.logging.simplelog.log.org.apache.http.wire=ERROR

(我的keyStore.jks中添加了vk.com证书)

这里是http-client的内部日志

[err] 2016/11/11 14:54:35:411 MSK [DEBUG] RequestAddCookies - CookieSpec selected: ignoreCookies
[err] 2016/11/11 14:54:35:412 MSK [DEBUG] RequestAuthCache - Auth cache not set in the context
[err] 2016/11/11 14:54:35:413 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection request: [route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 50]
[err] 2016/11/11 14:54:35:413 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection leased: [id: 6][route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 1 of 2; total allocated: 1 of 50]
[err] 2016/11/11 14:54:35:413 MSK [DEBUG] MainClientExec - Opening connection {s}->https://api.vk.com:443
[err] 2016/11/11 14:54:35:414 MSK [DEBUG] DefaultHttpClientConnectionOperator - Connecting to api.vk.com/87.240.165.75:443
[err] 2016/11/11 14:54:35:414 MSK [DEBUG] SSLConnectionSocketFactory - Connecting socket to api.vk.com/87.240.165.75:443 with timeout 5000
[err] 2016/11/11 14:54:35:494 MSK [DEBUG] SSLConnectionSocketFactory - Enabled protocols: [TLSv1, TLSv1.1, TLSv1.2]
[err] 2016/11/11 14:54:35:495 MSK [DEBUG] SSLConnectionSocketFactory - Enabled cipher suites:[TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
[err] 2016/11/11 14:54:35:495 MSK [DEBUG] SSLConnectionSocketFactory - Starting handshake
[err] 2016/11/11 14:54:35:641 MSK [DEBUG] SSLConnectionSocketFactory - Secure session established
[err] 2016/11/11 14:54:35:642 MSK [DEBUG] SSLConnectionSocketFactory -  negotiated protocol: TLSv1.2
[err] 2016/11/11 14:54:35:642 MSK [DEBUG] SSLConnectionSocketFactory -  negotiated cipher suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
[err] 2016/11/11 14:54:35:642 MSK [DEBUG] SSLConnectionSocketFactory -  peer principal: CN=*.vk.com, OU=Domain Control Validated
[err] 2016/11/11 14:54:35:642 MSK [DEBUG] SSLConnectionSocketFactory -  peer alternative names: [*.vk.com, vk.com]
[err] 2016/11/11 14:54:35:642 MSK [DEBUG] SSLConnectionSocketFactory -  issuer principal: CN=Go Daddy Secure Certificate Authority - G2, OU=http://certs.godaddy.com/repository/, O="GoDaddy.com, Inc.", L=Scottsdale, ST=Arizona, C=US
[err] 2016/11/11 14:54:35:643 MSK [DEBUG] DefaultHttpClientConnectionOperator - Connection established 172.20.10.2:55317<->87.240.165.75:443
[err] 2016/11/11 14:54:35:643 MSK [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-6: set socket timeout to 60000
[err] 2016/11/11 14:54:35:643 MSK [DEBUG] MainClientExec - Executing request GET /method/database.getCountries HTTP/1.1
[err] 2016/11/11 14:54:35:643 MSK [DEBUG] MainClientExec - Target auth state: UNCHALLENGED
[err] 2016/11/11 14:54:35:644 MSK [DEBUG] MainClientExec - Proxy auth state: UNCHALLENGED
[err] 2016/11/11 14:54:35:644 MSK [DEBUG] headers - http-outgoing-6 >> GET /method/database.getCountries HTTP/1.1
[err] 2016/11/11 14:54:35:644 MSK [DEBUG] headers - http-outgoing-6 >> Host: api.vk.com
[err] 2016/11/11 14:54:35:644 MSK [DEBUG] headers - http-outgoing-6 >> Connection: Keep-Alive
[err] 2016/11/11 14:54:35:645 MSK [DEBUG] headers - http-outgoing-6 >> User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36
[err] 2016/11/11 14:54:35:645 MSK [DEBUG] headers - http-outgoing-6 >> Accept-Encoding: gzip,deflate
[err] 2016/11/11 14:54:35:725 MSK [DEBUG] headers - http-outgoing-6 << HTTP/1.1 200 OK
[err] 2016/11/11 14:54:35:725 MSK [DEBUG] headers - http-outgoing-6 << Server: Apache
[err] 2016/11/11 14:54:35:726 MSK [DEBUG] headers - http-outgoing-6 << Date: Fri, 11 Nov 2016 11:54:35 GMT
[err] 2016/11/11 14:54:35:726 MSK [DEBUG] headers - http-outgoing-6 << Content-Type: application/json; charset=utf-8
[err] 2016/11/11 14:54:35:726 MSK [DEBUG] headers - http-outgoing-6 << Content-Length: 286
[err] 2016/11/11 14:54:35:727 MSK [DEBUG] headers - http-outgoing-6 << Connection: keep-alive
[err] 2016/11/11 14:54:35:727 MSK [DEBUG] headers - http-outgoing-6 << X-Powered-By: PHP/3.7212
[err] 2016/11/11 14:54:35:727 MSK [DEBUG] headers - http-outgoing-6 << Set-Cookie: remixlang=0; expires=Sun, 05 Nov 2017 18:31:29 GMT; path=/; domain=.vk.com
[err] 2016/11/11 14:54:35:727 MSK [DEBUG] headers - http-outgoing-6 << Pragma: no-cache
[err] 2016/11/11 14:54:35:728 MSK [DEBUG] headers - http-outgoing-6 << Cache-control: no-store
[err] 2016/11/11 14:54:35:728 MSK [DEBUG] headers - http-outgoing-6 << Content-Encoding: gzip
[err] 2016/11/11 14:54:35:728 MSK [DEBUG] MainClientExec - Connection can be kept alive indefinitely
[err] 2016/11/11 14:54:35:729 MSK [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-6: Close connection
[err] 2016/11/11 14:54:35:730 MSK [DEBUG] MainClientExec - Connection discarded
[err] 2016/11/11 14:54:35:730 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection released: [id: 6][route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 50]
[err] 2016/11/11 14:54:35:730 MSK [DEBUG] RequestAddCookies - CookieSpec selected: ignoreCookies
[err] 2016/11/11 14:54:35:731 MSK [DEBUG] RequestAuthCache - Auth cache not set in the context
[err] 2016/11/11 14:54:35:731 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection request: [route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 50]
[err] 2016/11/11 14:54:35:731 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection leased: [id: 7][route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 1 of 2; total allocated: 1 of 50]
[err] 2016/11/11 14:54:35:731 MSK [DEBUG] MainClientExec - Opening connection {s}->https://api.vk.com:443
[err] 2016/11/11 14:54:35:732 MSK [DEBUG] DefaultHttpClientConnectionOperator - Connecting to api.vk.com/87.240.165.75:443
[err] 2016/11/11 14:54:35:732 MSK [DEBUG] SSLConnectionSocketFactory - Connecting socket to api.vk.com/87.240.165.75:443 with timeout 5000
[err] 2016/11/11 14:54:35:786 MSK [DEBUG] SSLConnectionSocketFactory - Enabled protocols: [TLSv1, TLSv1.1, TLSv1.2]
[err] 2016/11/11 14:54:35:787 MSK [DEBUG] SSLConnectionSocketFactory - Enabled cipher suites:[TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
[err] 2016/11/11 14:54:35:787 MSK [DEBUG] SSLConnectionSocketFactory - Starting handshake
[err] 2016/11/11 14:54:35:909 MSK [DEBUG] SSLConnectionSocketFactory - Secure session established
[err] 2016/11/11 14:54:35:910 MSK [DEBUG] SSLConnectionSocketFactory -  negotiated protocol: TLSv1.2
[err] 2016/11/11 14:54:35:910 MSK [DEBUG] SSLConnectionSocketFactory -  negotiated cipher suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
[err] 2016/11/11 14:54:35:910 MSK [DEBUG] SSLConnectionSocketFactory -  peer principal: CN=*.vk.com, OU=Domain Control Validated
[err] 2016/11/11 14:54:35:911 MSK [DEBUG] SSLConnectionSocketFactory -  peer alternative names: [*.vk.com, vk.com]
[err] 2016/11/11 14:54:35:911 MSK [DEBUG] SSLConnectionSocketFactory -  issuer principal: CN=Go Daddy Secure Certificate Authority - G2, OU=http://certs.godaddy.com/repository/, O="GoDaddy.com, Inc.", L=Scottsdale, ST=Arizona, C=US
[err] 2016/11/11 14:54:35:911 MSK [DEBUG] DefaultHttpClientConnectionOperator - Connection established 172.20.10.2:55318<->87.240.165.75:443
[err] 2016/11/11 14:54:35:912 MSK [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-7: set socket timeout to 60000
[err] 2016/11/11 14:54:35:912 MSK [DEBUG] MainClientExec - Executing request GET /method/database.getCountries HTTP/1.1
[err] 2016/11/11 14:54:35:912 MSK [DEBUG] MainClientExec - Target auth state: UNCHALLENGED
[err] 2016/11/11 14:54:35:913 MSK [DEBUG] MainClientExec - Proxy auth state: UNCHALLENGED
[err] 2016/11/11 14:54:35:913 MSK [DEBUG] headers - http-outgoing-7 >> GET /method/database.getCountries HTTP/1.1
[err] 2016/11/11 14:54:35:913 MSK [DEBUG] headers - http-outgoing-7 >> Host: api.vk.com
[err] 2016/11/11 14:54:35:913 MSK [DEBUG] headers - http-outgoing-7 >> Connection: Keep-Alive
[err] 2016/11/11 14:54:35:914 MSK [DEBUG] headers - http-outgoing-7 >> User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36
[err] 2016/11/11 14:54:35:914 MSK [DEBUG] headers - http-outgoing-7 >> Accept-Encoding: gzip,deflate
[err] 2016/11/11 14:54:35:989 MSK [DEBUG] headers - http-outgoing-7 << HTTP/1.1 200 OK
[err] 2016/11/11 14:54:35:989 MSK [DEBUG] headers - http-outgoing-7 << Server: Apache
[err] 2016/11/11 14:54:35:990 MSK [DEBUG] headers - http-outgoing-7 << Date: Fri, 11 Nov 2016 11:54:35 GMT
[err] 2016/11/11 14:54:35:990 MSK [DEBUG] headers - http-outgoing-7 << Content-Type: application/json; charset=utf-8
[err] 2016/11/11 14:54:35:990 MSK [DEBUG] headers - http-outgoing-7 << Content-Length: 286
[err] 2016/11/11 14:54:35:990 MSK [DEBUG] headers - http-outgoing-7 << Connection: keep-alive
[err] 2016/11/11 14:54:35:991 MSK [DEBUG] headers - http-outgoing-7 << X-Powered-By: PHP/3.7212
[err] 2016/11/11 14:54:35:991 MSK [DEBUG] headers - http-outgoing-7 << Set-Cookie: remixlang=0; expires=Wed, 08 Nov 2017 21:16:16 GMT; path=/; domain=.vk.com
[err] 2016/11/11 14:54:35:991 MSK [DEBUG] headers - http-outgoing-7 << Pragma: no-cache
[err] 2016/11/11 14:54:35:991 MSK [DEBUG] headers - http-outgoing-7 << Cache-control: no-store
[err] 2016/11/11 14:54:35:992 MSK [DEBUG] headers - http-outgoing-7 << Content-Encoding: gzip
[err] 2016/11/11 14:54:35:992 MSK [DEBUG] MainClientExec - Connection can be kept alive indefinitely
[err] 2016/11/11 14:54:35:992 MSK [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-7: Close connection
[err] 2016/11/11 14:54:35:993 MSK [DEBUG] MainClientExec - Connection discarded
[err] 2016/11/11 14:54:35:993 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection released: [id: 7][route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 50]
[err] 2016/11/11 14:54:35:994 MSK [DEBUG] RequestAddCookies - CookieSpec selected: ignoreCookies
[err] 2016/11/11 14:54:35:994 MSK [DEBUG] RequestAuthCache - Auth cache not set in the context
[err] 2016/11/11 14:54:35:994 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection request: [route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 50]
[err] 2016/11/11 14:54:35:995 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection leased: [id: 8][route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 1 of 2; total allocated: 1 of 50]
[err] 2016/11/11 14:54:35:995 MSK [DEBUG] MainClientExec - Opening connection {s}->https://api.vk.com:443
[err] 2016/11/11 14:54:35:996 MSK [DEBUG] DefaultHttpClientConnectionOperator - Connecting to api.vk.com/87.240.165.75:443
[err] 2016/11/11 14:54:35:996 MSK [DEBUG] SSLConnectionSocketFactory - Connecting socket to api.vk.com/87.240.165.75:443 with timeout 5000
[err] 2016/11/11 14:54:36:050 MSK [DEBUG] SSLConnectionSocketFactory - Enabled protocols: [TLSv1, TLSv1.1, TLSv1.2]
[err] 2016/11/11 14:54:36:050 MSK [DEBUG] SSLConnectionSocketFactory - Enabled cipher suites:[TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
[err] 2016/11/11 14:54:36:050 MSK [DEBUG] SSLConnectionSocketFactory - Starting handshake
[err] 2016/11/11 14:54:36:117 MSK [DEBUG] SSLConnectionSocketFactory - Secure session established
[err] 2016/11/11 14:54:36:118 MSK [DEBUG] SSLConnectionSocketFactory -  negotiated protocol: TLSv1.2
[err] 2016/11/11 14:54:36:118 MSK [DEBUG] SSLConnectionSocketFactory -  negotiated cipher suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
[err] 2016/11/11 14:54:36:118 MSK [DEBUG] SSLConnectionSocketFactory -  peer principal: CN=*.vk.com, OU=Domain Control Validated
[err] 2016/11/11 14:54:36:118 MSK [DEBUG] SSLConnectionSocketFactory -  peer alternative names: [*.vk.com, vk.com]
[err] 2016/11/11 14:54:36:118 MSK [DEBUG] SSLConnectionSocketFactory -  issuer principal: CN=Go Daddy Secure Certificate Authority - G2, OU=http://certs.godaddy.com/repository/, O="GoDaddy.com, Inc.", L=Scottsdale, ST=Arizona, C=US
[err] 2016/11/11 14:54:36:119 MSK [DEBUG] DefaultHttpClientConnectionOperator - Connection established 172.20.10.2:55331<->87.240.165.75:443
[err] 2016/11/11 14:54:36:119 MSK [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-8: set socket timeout to 60000
[err] 2016/11/11 14:54:36:119 MSK [DEBUG] MainClientExec - Executing request GET /method/database.getCountries HTTP/1.1
[err] 2016/11/11 14:54:36:119 MSK [DEBUG] MainClientExec - Target auth state: UNCHALLENGED
[err] 2016/11/11 14:54:36:119 MSK [DEBUG] MainClientExec - Proxy auth state: UNCHALLENGED
[err] 2016/11/11 14:54:36:120 MSK [DEBUG] headers - http-outgoing-8 >> GET /method/database.getCountries HTTP/1.1
[err] 2016/11/11 14:54:36:120 MSK [DEBUG] headers - http-outgoing-8 >> Host: api.vk.com
[err] 2016/11/11 14:54:36:120 MSK [DEBUG] headers - http-outgoing-8 >> Connection: Keep-Alive
[err] 2016/11/11 14:54:36:120 MSK [DEBUG] headers - http-outgoing-8 >> User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36
[err] 2016/11/11 14:54:36:120 MSK [DEBUG] headers - http-outgoing-8 >> Accept-Encoding: gzip,deflate
[err] 2016/11/11 14:54:36:188 MSK [DEBUG] headers - http-outgoing-8 << HTTP/1.1 200 OK
[err] 2016/11/11 14:54:36:189 MSK [DEBUG] headers - http-outgoing-8 << Server: Apache
[err] 2016/11/11 14:54:36:189 MSK [DEBUG] headers - http-outgoing-8 << Date: Fri, 11 Nov 2016 11:54:36 GMT
[err] 2016/11/11 14:54:36:189 MSK [DEBUG] headers - http-outgoing-8 << Content-Type: application/json; charset=utf-8
[err] 2016/11/11 14:54:36:189 MSK [DEBUG] headers - http-outgoing-8 << Content-Length: 286
[err] 2016/11/11 14:54:36:190 MSK [DEBUG] headers - http-outgoing-8 << Connection: keep-alive
[err] 2016/11/11 14:54:36:190 MSK [DEBUG] headers - http-outgoing-8 << X-Powered-By: PHP/3.7212
[err] 2016/11/11 14:54:36:190 MSK [DEBUG] headers - http-outgoing-8 << Set-Cookie: remixlang=0; expires=Thu, 16 Nov 2017 00:20:15 GMT; path=/; domain=.vk.com
[err] 2016/11/11 14:54:36:190 MSK [DEBUG] headers - http-outgoing-8 << Pragma: no-cache
[err] 2016/11/11 14:54:36:190 MSK [DEBUG] headers - http-outgoing-8 << Cache-control: no-store
[err] 2016/11/11 14:54:36:190 MSK [DEBUG] headers - http-outgoing-8 << Content-Encoding: gzip
[err] 2016/11/11 14:54:36:191 MSK [DEBUG] MainClientExec - Connection can be kept alive indefinitely
[err] 2016/11/11 14:54:36:191 MSK [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-8: Close connection
[err] 2016/11/11 14:54:36:192 MSK [DEBUG] MainClientExec - Connection discarded
[err] 2016/11/11 14:54:36:192 MSK [DEBUG] PoolingHttpClientConnectionManager - Connection released: [id: 8][route: {s}->https://api.vk.com:443][total kept alive: 0; route allocated: 0 of 2; total allocated: 0 of 50]
[14:54:36.193] TRACE [proliker.utils.TestService.hc(TestService.java:300)]: reqTime1:    319 
[14:54:36.193] TRACE [proliker.utils.TestService.hc(TestService.java:301)]: reqTime2:    264 
[14:54:36.194] TRACE [proliker.utils.TestService.hc(TestService.java:302)]: reqTime3:    198 

当然，上述测试是在关闭内部日志记录的情况下执行的，因为它会为每个请求额外增加约 50 毫秒。

我已经阅读了所有 apache http-client 站点文档三次，我不知道去哪里看，哪里有错误。我非常希望，一些极客可以帮助我提高请求速度。

Answer 1

[err] 2016/11/11 14:54:36:191 MSK [DEBUG] MainClientExec - Connection can be kept alive indefinitely
[err] 2016/11/11 14:54:36:191 MSK [DEBUG] DefaultManagedHttpClientConnection - http-outgoing-8: Close connection
[err] 2016/11/11 14:54:36:192 MSK [DEBUG] MainClientExec - Connection discarded

如果这不是故意的，那么使 HttpClient 更快的最简单方法是重新使用连接(尤其是在使用 SSL/TLS 传输安全性时)。

始终确保响应内容已被完全消耗(通过从内容流读取直到流结束或关闭流)。

try(CloseableHttpResponse response1 = httpClient.execute(new HttpGet("https://api.vk.com/method/database.getCountries"))) {
    int code1 = response1.getStatusLine().getStatusCode();
    EntityUtils.consume(response1.getEntity());
}