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c++ std::async的注意事项

qianbo_insist 发布时间：2021-08-11 12:39:47 ，浏览量：5

1、没有返回

考虑下面这个耗时操作

void foo(int &n)
{
	for (int i = 0; i


    
        



        
        
            
                
                
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	    基本
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	请求信息 : 2025-09-15 04:24:26 HTTP/2.0 GET : /home/article/detail/id/382607.html
运行时间 : 0.0569s ( Load:0.0138s Init:0.0042s Exec:0.0243s Template:0.0146s )
吞吐率 : 17.57req/s
内存开销 : 1,924.45 kb
查询信息 : 18 queries 0 writes 
文件加载 : 36
缓存信息 : 5 gets 0 writes 
配置加载 : 132
会话信息 : SESSION_ID=sv32374s8v5fh03qr3g8gh9o32
    
    
        
    
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	[ app_init ] --START--
Run Behavior\BuildLiteBehavior [ RunTime:0.000028s ]
[ app_init ] --END-- [ RunTime:0.000127s ]
[ app_begin ] --START--
Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.002068s ]
[ app_begin ] --END-- [ RunTime:0.002204s ]
[ view_parse ] --START--
[ template_filter ] --START--
Run Behavior\ContentReplaceBehavior [ RunTime:0.000068s ]
[ template_filter ] --END-- [ RunTime:0.000109s ]
Run Behavior\ParseTemplateBehavior [ RunTime:0.011613s ]
[ view_parse ] --END-- [ RunTime:0.011649s ]
[ view_filter ] --START--
Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000204s ]
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[ app_end ] --START--
    
    
        
    
	[2] session_save_path(): open_basedir restriction in effect. File(/var/lib/php/session) is not within the allowed path(s): (/www/wwwroot/www.chaojiit.com/:/tmp/) /www/wwwroot/www.chaojiit.com/ThinkPHP/Common/functions.php 第 1239 行.
[8192] Array and string offset access syntax with curly braces is deprecated /www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 40 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 101 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 101 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 102 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 102 行.
[8] Undefined variable: pinglun_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 111 行.
    
    
        
    
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SELECT * FROM `menu` WHERE `fid` = 2 AND `status` = 1  [ RunTime:0.0002s ]
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SHOW COLUMNS FROM `bloger` [ RunTime:0.0012s ]
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SELECT COUNT(*) AS tp_count FROM `article` WHERE `bloger_id` = 576 LIMIT 1   [ RunTime:0.0001s ]
SHOW COLUMNS FROM `article_content` [ RunTime:0.0005s ]
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SHOW COLUMNS FROM `article_cate` [ RunTime:0.0008s ]
SELECT `name` FROM `article_cate` WHERE `id` = 115 LIMIT 1   [ RunTime:0.0001s ]
SELECT * FROM `article` WHERE `bloger_id` = 576 ORDER BY view_count desc LIMIT 0,10   [ RunTime:0.0005s ]
    
    
        
    
	    
    
    



0.0569s