{"id":32619,"date":"2025-10-24T00:40:59","date_gmt":"2025-10-23T21:40:59","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/?p=32619"},"modified":"2025-10-24T00:40:59","modified_gmt":"2025-10-23T21:40:59","slug":"time-komutu-ile-komut-yurutme-suresini-nasil-olcersiniz","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/time-komutu-ile-komut-yurutme-suresini-nasil-olcersiniz\/","title":{"rendered":"time Komutu ile Komut Y\u00fcr\u00fctme S\u00fcresini Nas\u0131l \u00d6l\u00e7ersiniz?"},"content":{"rendered":"

<\/p>\n

time Komutu ile Komut Y\u00fcr\u00fctme S\u00fcresini Nas\u0131l \u00d6l\u00e7ersiniz?<\/h2>\n

Linux ve di\u011fer Unix benzeri i\u015fletim sistemlerinde performans analizi ve optimizasyon, sistem y\u00f6neticileri, geli\u015ftiriciler ve hatta ileri d\u00fczey kullan\u0131c\u0131lar i\u00e7in kritik bir beceridir. Bir komutun veya bir beti\u011fin ne kadar s\u00fcrede \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 bilmek, darbo\u011fazlar\u0131 tespit etmek, kaynak t\u00fcketimini anlamak ve farkl\u0131 yakla\u015f\u0131mlar\u0131n etkinli\u011fini kar\u015f\u0131la\u015ft\u0131rmak i\u00e7in temel bir ad\u0131md\u0131r. Bu ba\u011flamda, time<\/code> komutu, bir komutun y\u00fcr\u00fctme s\u00fcresini \u00f6l\u00e7mek i\u00e7in en basit ve en yayg\u0131n kullan\u0131lan ara\u00e7lardan biridir. Bu makale, time<\/code> komutunun derinlemesine incelenmesi, farkl\u0131 kullan\u0131mlar\u0131, \u00e7\u0131kt\u0131lar\u0131n\u0131 yorumlama ve pratik senaryolarda nas\u0131l uygulanaca\u011f\u0131 \u00fczerine odaklanacakt\u0131r.<\/p>\n

Giri\u015f: Neden Zaman \u00d6l\u00e7\u00fcm\u00fc \u00d6nemlidir?<\/h3>\n

Bir komutun y\u00fcr\u00fctme s\u00fcresini \u00f6l\u00e7mek, sadece “ne kadar h\u0131zl\u0131 \u00e7al\u0131\u015f\u0131yor?” sorusuna yan\u0131t vermekten \u00e7ok daha fazlas\u0131n\u0131 ifade eder. Bu \u00f6l\u00e7\u00fcmler, a\u015fa\u011f\u0131daki gibi bir\u00e7ok \u00f6nemli alanda de\u011ferli bilgiler sa\u011flar:<\/p>\n

* Performans Optimizasyonu:<\/strong> Bir uygulaman\u0131n veya beti\u011fin hangi b\u00f6l\u00fcm\u00fcn\u00fcn daha fazla zaman harcad\u0131\u011f\u0131n\u0131 anlamak, optimizasyon \u00e7abalar\u0131n\u0131 do\u011fru yere y\u00f6nlendirmeye yard\u0131mc\u0131 olur.
\n* Kaynak Y\u00f6netimi:<\/strong> Bir komutun ne kadar CPU s\u00fcresi, bellek veya G\/\u00c7 kayna\u011f\u0131 t\u00fcketti\u011fini bilmek, sistem kaynaklar\u0131n\u0131n daha verimli kullan\u0131lmas\u0131na olanak tan\u0131r.
\n* K\u0131yaslama (Benchmarking):<\/strong> Farkl\u0131 algoritmalar\u0131n, konfig\u00fcrasyonlar\u0131n veya donan\u0131m bile\u015fenlerinin performans\u0131n\u0131 kar\u015f\u0131la\u015ft\u0131rmak i\u00e7in objektif veriler sunar.
\n* Hata Ay\u0131klama (Debugging):<\/strong> Beklenenden daha uzun s\u00fcren komutlar, potansiyel hatalar\u0131 veya kilitlenmeleri i\u015faret edebilir.
\n* Kapasite Planlama:<\/strong> Gelecekteki i\u015f y\u00fckleri i\u00e7in sistem gereksinimlerini tahmin etmeye yard\u0131mc\u0131 olur.<\/p>\n

time<\/code> komutu, bu hedeflere ula\u015fmak i\u00e7in h\u0131zl\u0131 ve kolay bir yol sunar. Bir komutu time<\/code> \u00f6nekiyle \u00e7al\u0131\u015ft\u0131rd\u0131\u011f\u0131n\u0131zda, o komutun ger\u00e7ek zaman\u0131n\u0131 (wall-clock time), kullan\u0131c\u0131 CPU s\u00fcresini ve sistem CPU s\u00fcresini raporlar. Bu \u00fc\u00e7 de\u011fer, bir komutun performans\u0131 hakk\u0131nda ilk d\u00fczeyde \u00f6nemli ipu\u00e7lar\u0131 verir.<\/p>\n

time Komutunun Temel Kullan\u0131m\u0131 ve \u00c7\u0131kt\u0131lar\u0131<\/h3>\n

time<\/code> komutunun en temel kullan\u0131m\u0131, \u00f6l\u00e7mek istedi\u011finiz komutun \u00f6n\u00fcne time<\/code> yazmakt\u0131r:<\/p>\n

time  [arg\u00fcmanlar]<\/code><\/pre>\n
\u00d6rne\u011fin, \/<\/code> dizini alt\u0131nda t\u00fcm dosyalar\u0131 listelemek ve bu i\u015flemin ne kadar s\u00fcrd\u00fc\u011f\u00fcn\u00fc g\u00f6rmek i\u00e7in a\u015fa\u011f\u0131daki komutu kullanabiliriz:<\/p>\n
time ls -R \/<\/code><\/pre>\n
Bu komutun \u00e7\u0131kt\u0131s\u0131, ls -R \/<\/code> komutunun kendi \u00e7\u0131kt\u0131s\u0131n\u0131n ard\u0131ndan, time<\/code> komutunun raporlad\u0131\u011f\u0131 s\u00fcreleri i\u00e7erecektir. Tipik bir \u00e7\u0131kt\u0131 \u015f\u00f6yle g\u00f6r\u00fcnebilir (kabuktan kabu\u011fa ve sistemden sisteme de\u011fi\u015febilir):<\/p>\n
... (ls -R \/ \u00e7\u0131kt\u0131s\u0131) ...\n\nreal    0m5.123s\nuser    0m0.456s\nsys     0m1.789s<\/code><\/pre>\n
\u015eimdi bu \u00fc\u00e7 temel \u00f6l\u00e7\u00fct\u00fc a\u00e7\u0131klayal\u0131m:<\/p>\n
*   real<\/code> (Ger\u00e7ek S\u00fcre \/ Duvar Saati S\u00fcresi):<\/strong> Bu, komutun ba\u015flang\u0131c\u0131ndan biti\u015fine kadar ge\u00e7en toplam ger\u00e7ek s\u00fcredir. Bir kronometre ile \u00f6l\u00e7\u00fclen s\u00fcreye benzer. Bu s\u00fcre, komutun \u00e7al\u0131\u015fmas\u0131n\u0131 bekledi\u011fi G\/\u00c7 i\u015flemleri, di\u011fer s\u00fcre\u00e7lerin CPU’yu kullanmas\u0131, a\u011f gecikmeleri gibi t\u00fcm bekleme s\u00fcrelerini i\u00e7erir.
\n*   user<\/code> (Kullan\u0131c\u0131 S\u00fcresi):<\/strong> Bu, CPU’nun komutun kullan\u0131c\u0131 modunda (yani, uygulaman\u0131n kendi kodu i\u00e7inde) harcad\u0131\u011f\u0131 toplam s\u00fcredir. Sistem \u00e7a\u011fr\u0131lar\u0131 veya \u00e7ekirdek i\u015flemleri bu s\u00fcreye dahil de\u011fildir. \u00c7ok \u00e7ekirdekli sistemlerde, e\u011fer bir uygulama birden fazla \u00e7ekirde\u011fi e\u015fzamanl\u0131 olarak kullan\u0131yorsa, user<\/code> s\u00fcresi real<\/code> s\u00fcresinden daha b\u00fcy\u00fck olabilir.
\n*   sys<\/code> (Sistem S\u00fcresi):<\/strong> Bu, CPU’nun komutun \u00e7ekirdek modunda (yani, i\u015fletim sistemi \u00e7ekirde\u011fi i\u00e7inde) harcad\u0131\u011f\u0131 toplam s\u00fcredir. Bu genellikle sistem \u00e7a\u011fr\u0131lar\u0131, G\/\u00c7 i\u015flemleri (dosya okuma\/yazma, a\u011f ileti\u015fimi) ve di\u011fer \u00e7ekirdek hizmetleri i\u00e7in harcanan zaman\u0131 temsil eder. user<\/code> s\u00fcresinde oldu\u011fu gibi, sys<\/code> s\u00fcresi de birden fazla \u00e7ekirde\u011fin kullan\u0131ld\u0131\u011f\u0131 durumlarda real<\/code> s\u00fcresinden daha b\u00fcy\u00fck olabilir.<\/p>\n
Bu \u00fc\u00e7 de\u011ferin farkl\u0131 olmas\u0131 \u00f6nemlidir. E\u011fer real<\/code> s\u00fcresi, user<\/code> ve sys<\/code> s\u00fcrelerinin toplam\u0131ndan \u00e7ok daha b\u00fcy\u00fckse, bu genellikle komutun G\/\u00c7 ba\u011f\u0131ml\u0131 oldu\u011funu veya ba\u015fka s\u00fcre\u00e7ler taraf\u0131ndan CPU’nun me\u015fgul edildi\u011fini g\u00f6sterir. E\u011fer user<\/code> ve sys<\/code> s\u00fcrelerinin toplam\u0131 real<\/code> s\u00fcreye yak\u0131n veya ondan b\u00fcy\u00fckse, bu komutun CPU ba\u011f\u0131ml\u0131 oldu\u011funu ve i\u015flemci \u00fczerinde yo\u011fun \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 g\u00f6sterir.<\/p>\n
Farkl\u0131 time Komutu Uygulamalar\u0131: Kabuk Dahili vs. GNU time<\/h3>\n
Linux sistemlerinde time<\/code> komutunun iki ana uygulamas\u0131 bulunur ve bu, \u00e7\u0131kt\u0131n\u0131n format\u0131n\u0131 ve kullan\u0131labilir se\u00e7enekleri etkileyebilir:<\/p>\n
1.  Kabuk Dahili time<\/code> (Shell Built-in time<\/code>):<\/strong> \u00c7o\u011fu modern kabuk (Bash, Zsh, Fish gibi) kendi time<\/code> komutuna sahiptir. Bu dahili komutlar genellikle daha basit bir \u00e7\u0131kt\u0131 format\u0131 sunar ve daha az yap\u0131land\u0131rma se\u00e7ene\u011fine sahiptir. \u00d6rne\u011fin, Bash’in dahili time<\/code> komutu yukar\u0131da g\u00f6sterilen basit real<\/code>, user<\/code>, sys<\/code> \u00e7\u0131kt\u0131s\u0131n\u0131 verir. Kabu\u011fun dahili time<\/code> komutunu kulland\u0131\u011f\u0131n\u0131zdan emin olmak i\u00e7in, type time<\/code> komutunu \u00e7al\u0131\u015ft\u0131rabilirsiniz. \u00c7\u0131kt\u0131 genellikle time is a shell keyword<\/code> veya time is a shell builtin<\/code> gibi bir \u015fey olacakt\u0131r.
\n2.  GNU time<\/code> Yard\u0131mc\u0131 Program\u0131 (\/usr\/bin\/time<\/code>):<\/strong> Bu, genellikle \/usr\/bin\/time<\/code> yolunda bulunan ayr\u0131 bir programd\u0131r. GNU time<\/code>, kabuk dahili time<\/code>‘dan \u00e7ok daha g\u00fc\u00e7l\u00fc ve esnektir. Daha ayr\u0131nt\u0131l\u0131 metrikler sunar ve \u00e7\u0131kt\u0131y\u0131 \u00f6zelle\u015ftirmek i\u00e7in bir\u00e7ok se\u00e7ene\u011fe (\u00f6rne\u011fin, -f<\/code> formatlama se\u00e7ene\u011fi) sahiptir. E\u011fer kabuk dahili time<\/code> yerine \u00f6zellikle GNU time<\/code>‘\u0131 kullanmak istiyorsan\u0131z, komutu tam yoluyla \u00e7a\u011f\u0131rman\u0131z gerekir: \/usr\/bin\/time <\/code> veya \\time <\/code> (ters e\u011fik \u00e7izgi, kabu\u011fun dahili komutunu atlamas\u0131n\u0131 sa\u011flar).<\/p>\n
Bu makalenin geri kalan\u0131nda, daha geli\u015fmi\u015f \u00f6zelliklere ve daha detayl\u0131 \u00e7\u0131kt\u0131lara sahip oldu\u011fu i\u00e7in genellikle GNU time<\/code> yard\u0131mc\u0131 program\u0131na odaklanaca\u011f\u0131z.<\/p>\n
GNU time’\u0131n Geli\u015fmi\u015f \u00d6zellikleri<\/h3>\n
GNU time<\/code> komutu, daha derinlemesine performans analizi i\u00e7in bir dizi geli\u015fmi\u015f \u00f6zellik sunar.<\/p>\n
\u00c7\u0131kt\u0131 Formatlama (-f<\/code> veya --format<\/code> Se\u00e7ene\u011fi)<\/h4>\n
GNU time<\/code>‘\u0131n en g\u00fc\u00e7l\u00fc \u00f6zelliklerinden biri, \u00e7\u0131kt\u0131 format\u0131n\u0131 tamamen \u00f6zelle\u015ftirebilme yetene\u011fidir. -f<\/code> veya --format<\/code> se\u00e7ene\u011fini kullanarak, istedi\u011finiz metrikleri ve bunlar\u0131n nas\u0131l g\u00f6r\u00fcnt\u00fclenece\u011fini belirleyebilirsiniz. \u0130\u015fte baz\u0131 yayg\u0131n format belirleyiciler:<\/p>\n
*   %e<\/code>: Ger\u00e7ek s\u00fcre (elapsed time)
\n*   %U<\/code>: Kullan\u0131c\u0131 CPU s\u00fcresi
\n*   %S<\/code>: Sistem CPU s\u00fcresi
\n*   %P<\/code>: Toplam CPU y\u00fczdesi (user + sys \/ real)
\n*   %M<\/code>: Maksimum yerle\u015fik k\u00fcme boyutu (bellek kullan\u0131m\u0131, KB cinsinden)
\n*   %K<\/code>: Ortalama toplam bellek kullan\u0131m\u0131 (KB cinsinden)
\n*   %W<\/code>: \u0130\u015flem taraf\u0131ndan takas edilen sayfa say\u0131s\u0131
\n*   %I<\/code>: Girdi i\u015flemleri say\u0131s\u0131
\n*   %O<\/code>: \u00c7\u0131kt\u0131 i\u015flemleri say\u0131s\u0131
\n*   %F<\/code>: Ana olmayan sayfa hatalar\u0131 say\u0131s\u0131 (minor page faults)
\n*   %R<\/code>: Ana sayfa hatalar\u0131 say\u0131s\u0131 (major page faults)
\n*   %x<\/code>: \u00c7\u0131k\u0131\u015f durumu (exit status)
\n*   %C<\/code>: Komut ad\u0131 ve arg\u00fcmanlar\u0131
\n*   \\n<\/code>: Yeni sat\u0131r
\n*   \\t<\/code>: Sekme<\/p>\n
\u00d6rnek bir formatlama string’i:<\/p>\n
\/usr\/bin\/time -f \"Ger\u00e7ek S\u00fcre: %e s\\nKullan\u0131c\u0131 S\u00fcresi: %U s\\nSistem S\u00fcresi: %S s\\nCPU Kullan\u0131m\u0131: %P\\nMaksimum Bellek: %M KB\\nGirdi: %I, \u00c7\u0131kt\u0131: %O\" sleep 1.5<\/code><\/pre>\n
Bu komutun \u00e7\u0131kt\u0131s\u0131 \u015f\u00f6yle g\u00f6r\u00fcnebilir:<\/p>\n
Ger\u00e7ek S\u00fcre: 1.50 s\nKullan\u0131c\u0131 S\u00fcresi: 0.00 s\nSistem S\u00fcresi: 0.00 s\nCPU Kullan\u0131m\u0131: 0%\nMaksimum Bellek: 1392 KB\nGirdi: 0, \u00c7\u0131kt\u0131: 0<\/code><\/pre>\n
sleep<\/code> komutu CPU ve G\/\u00c7 yo\u011fun bir komut olmad\u0131\u011f\u0131 i\u00e7in user<\/code>, sys<\/code>, CPU Kullan\u0131m\u0131<\/code>, Girdi<\/code> ve \u00c7\u0131kt\u0131<\/code> de\u011ferleri s\u0131f\u0131ra yak\u0131n \u00e7\u0131km\u0131\u015ft\u0131r. Daha karma\u015f\u0131k bir komutla bu de\u011ferler anlaml\u0131 hale gelecektir.<\/p>\n
Ayr\u0131nt\u0131l\u0131 \u00c7\u0131kt\u0131 (-v<\/code> veya --verbose<\/code> Se\u00e7ene\u011fi)<\/h4>\n
E\u011fer t\u00fcm format belirleyicileri tek tek yazmak istemiyorsan\u0131z, -v<\/code> veya --verbose<\/code> se\u00e7ene\u011fini kullanarak GNU time<\/code>‘\u0131n mevcut t\u00fcm metrikleri standart, okunabilir bir formatta raporlamas\u0131n\u0131 sa\u011flayabilirsiniz:<\/p>\n
\/usr\/bin\/time -v ls -R \/tmp<\/code><\/pre>\n
Bu komut, ls -R \/tmp<\/code> komutunun \u00e7\u0131kt\u0131s\u0131n\u0131n ard\u0131ndan, a\u015fa\u011f\u0131daki gibi \u00e7ok daha kapsaml\u0131 bir performans \u00f6zeti sunacakt\u0131r:<\/p>\n
... (ls -R \/tmp \u00e7\u0131kt\u0131s\u0131) ...\n\n        Command being timed: \"ls -R \/tmp\"\n        User time (seconds): 0.00\n        System time (seconds): 0.00\n        Percent of CPU this job got: 0%\n        Elapsed (wall clock) time (h:mm:ss or m:ss): 0m0.002s\n        Average shared text size (kbytes): 0\n        Average unshared data size (kbytes): 0\n        Average stack size (kbytes): 0\n        Average total memory (kbytes): 0\n        Maximum resident set size (kbytes): 1404\n        Average resident set size (kbytes): 0\n        Major (requiring I\/O) page faults: 0\n        Minor (reclaiming a frame) page faults: 139\n        Voluntary context switches: 2\n        Involuntary context switches: 0\n        Swaps: 0\n        File system inputs: 0\n        File system outputs: 0\n        Socket messages sent: 0\n        Socket messages received: 0\n        Signals delivered: 0\n        Page size (bytes): 4096\n        Exit status: 0<\/code><\/pre>\n
Bu \u00e7\u0131kt\u0131, bellek kullan\u0131m\u0131 (Maximum resident set size), sayfa hatalar\u0131 (Major\/Minor page faults), ba\u011flam anahtarlamalar\u0131 (Voluntary\/Involuntary context switches) gibi \u00e7ok daha detayl\u0131 bilgiler sunar. Bu metrikler, \u00f6zellikle sistem d\u00fczeyinde performans sorunlar\u0131n\u0131 te\u015fhis etmek i\u00e7in son derece faydal\u0131d\u0131r.<\/p>\n
\u00c7\u0131kt\u0131y\u0131 Dosyaya Y\u00f6nlendirme (-o<\/code> veya --output<\/code> Se\u00e7ene\u011fi)<\/h4>\n
time<\/code> komutunun \u00e7\u0131kt\u0131s\u0131 varsay\u0131lan olarak standart hata (stderr) ak\u0131\u015f\u0131na g\u00f6nderilir. Bu, zamanlanan komutun kendi standart \u00e7\u0131kt\u0131s\u0131 (stdout) ile kar\u0131\u015fmamas\u0131n\u0131 sa\u011flar. Ancak, bu \u00e7\u0131kt\u0131y\u0131 bir dosyaya kaydetmek veya ba\u015fka bir komuta y\u00f6nlendirmek isteyebilirsiniz. Bunun i\u00e7in -o<\/code> veya --output<\/code> se\u00e7ene\u011fini kullanabilirsiniz:<\/p>\n
\/usr\/bin\/time -o zamanlama_sonucu.txt ls -R \/<\/code><\/pre>\n
Bu komut, ls -R \/<\/code> komutunun normal \u00e7\u0131kt\u0131s\u0131n\u0131 ekrana basarken, time<\/code> komutunun raporunu zamanlama_sonucu.txt<\/code> dosyas\u0131na yazar. E\u011fer dosyaya eklemek isterseniz, -a<\/code> veya --append<\/code> se\u00e7ene\u011fini -o<\/code> ile birlikte kullanabilirsiniz:<\/p>\n
\/usr\/bin\/time -o zamanlama_sonucu.txt -a ls -R \/tmp<\/code><\/pre>\n
Bu, \u00f6zellikle bir dizi komutun veya bir beti\u011fin zamanlamalar\u0131n\u0131 kaydetmek ve daha sonra analiz etmek i\u00e7in kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n
Sessiz \u00c7\u0131kt\u0131 (-q<\/code> veya --quiet<\/code> Se\u00e7ene\u011fi)<\/h4>\n
-q<\/code> veya --quiet<\/code> se\u00e7ene\u011fi, time<\/code> komutunun kendisinin standart hata \u00e7\u0131kt\u0131s\u0131n\u0131 bast\u0131r\u0131r. Bu, zamanlanan komutun kendi hata mesajlar\u0131n\u0131 g\u00f6rmeye devam ederken, time<\/code> komutunun bilgilendirici \u00e7\u0131kt\u0131lar\u0131n\u0131 gizlemek istedi\u011finizde faydal\u0131 olabilir. Ancak, bu genellikle -o<\/code> ile birlikte kullan\u0131l\u0131r, b\u00f6ylece \u00e7\u0131kt\u0131y\u0131 bir dosyaya kaydederken ekranda gereksiz bilgi kirlili\u011fi olmaz.<\/p>\n
Sonu\u00e7lar\u0131 Yorumlama<\/h3>\n
time<\/code> komutunun sa\u011flad\u0131\u011f\u0131 metrikleri do\u011fru bir \u015fekilde yorumlamak, performans analizi i\u00e7in anahtard\u0131r.<\/p>\n
*   real<\/code> vs. (user<\/code> + sys<\/code>):<\/strong>
\n    *   E\u011fer real<\/code> s\u00fcresi, user<\/code> ve sys<\/code> s\u00fcrelerinin toplam\u0131ndan \u00e7ok daha b\u00fcy\u00fckse<\/strong>: Komut b\u00fcy\u00fck olas\u0131l\u0131kla G\/\u00c7 ba\u011f\u0131ml\u0131d\u0131r (disk okuma\/yazma, a\u011f i\u015flemleri), di\u011fer s\u00fcre\u00e7lerin CPU’yu kullanmas\u0131n\u0131 beklemi\u015ftir veya uyku durumunda \u00e7ok zaman ge\u00e7irmi\u015ftir. Bu durumda, G\/\u00c7 performans\u0131n\u0131 veya sistemdeki genel y\u00fck\u00fc incelemek gerekebilir.
\n    *   E\u011fer user<\/code> ve sys<\/code> s\u00fcrelerinin toplam\u0131 real<\/code> s\u00fcreye yak\u0131nsa<\/strong>: Komut b\u00fcy\u00fck olas\u0131l\u0131kla CPU ba\u011f\u0131ml\u0131d\u0131r ve i\u015flemci \u00fczerinde yo\u011fun bir \u015fekilde \u00e7al\u0131\u015fm\u0131\u015ft\u0131r.
\n    *   E\u011fer user<\/code> ve sys<\/code> s\u00fcrelerinin toplam\u0131 real<\/code> s\u00fcresinden b\u00fcy\u00fckse<\/strong>: Bu genellikle \u00e7ok \u00e7ekirdekli bir sistemde, \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 (multi-threaded) kullanan bir uygulaman\u0131n birden fazla CPU \u00e7ekirde\u011fini e\u015fzamanl\u0131 olarak kulland\u0131\u011f\u0131n\u0131 g\u00f6sterir. \u00d6rne\u011fin, 4 \u00e7ekirdekli bir sistemde, 2 saniyede biten bir i\u015flem, her bir \u00e7ekirde\u011fi 3 saniye boyunca kullanm\u0131\u015fsa, user<\/code> s\u00fcresi 6 saniye olabilirken, real<\/code> s\u00fcresi 2 saniye olacakt\u0131r.<\/p>\n
*   Y\u00fcksek sys<\/code> s\u00fcresi:<\/strong> Komutun s\u0131k s\u0131k \u00e7ekirdek hizmetlerini veya sistem \u00e7a\u011fr\u0131lar\u0131n\u0131 kulland\u0131\u011f\u0131n\u0131 g\u00f6sterir. Bu, yo\u011fun dosya veya a\u011f i\u015flemleri, bellek ay\u0131rma\/serbest b\u0131rakma gibi durumlar i\u00e7in tipiktir.
\n*   Y\u00fcksek user<\/code> s\u00fcresi:<\/strong> Komutun kendi algoritmas\u0131n\u0131 veya hesaplamalar\u0131n\u0131 kullan\u0131c\u0131 alan\u0131nda yo\u011fun bir \u015fekilde ger\u00e7ekle\u015ftirdi\u011fini g\u00f6sterir. Bu, matematiksel hesaplamalar, veri i\u015fleme veya karma\u015f\u0131k algoritmalar \u00e7al\u0131\u015ft\u0131ran uygulamalar i\u00e7in yayg\u0131nd\u0131r.
\n*   %P<\/code> (CPU Kullan\u0131m\u0131 Y\u00fczdesi):<\/strong> Bu metrik, (user + sys) \/ real<\/code> oran\u0131n\u0131 y\u00fczde olarak ifade eder. Y\u00fcksek bir y\u00fczde (\u00f6rne\u011fin, %90’\u0131n \u00fczeri), komutun CPU’yu etkin bir \u015fekilde kulland\u0131\u011f\u0131n\u0131 g\u00f6sterirken, d\u00fc\u015f\u00fck bir y\u00fczde (\u00f6rne\u011fin, %20’nin alt\u0131), komutun \u00e7o\u011funlukla bir \u015feyi bekledi\u011fini (G\/\u00c7, a\u011f, di\u011fer s\u00fcre\u00e7ler) veya bo\u015fta kald\u0131\u011f\u0131n\u0131 g\u00f6sterir. \u00c7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 kullanan uygulamalar i\u00e7in bu y\u00fczde %100’\u00fc a\u015fabilir (\u00f6rne\u011fin, 4 \u00e7ekirdekli bir sistemde %400’e kadar).
\n*   %M<\/code> (Maksimum Bellek Kullan\u0131m\u0131):<\/strong> Bir komutun y\u00fcr\u00fct\u00fclmesi s\u0131ras\u0131nda sistemden talep etti\u011fi maksimum bellek miktar\u0131n\u0131 g\u00f6sterir. Bu, bellek s\u0131z\u0131nt\u0131lar\u0131n\u0131 veya a\u015f\u0131r\u0131 bellek t\u00fcketimini tespit etmek i\u00e7in kritik bir metrik olabilir.
\n*   %I<\/code> ve %O<\/code> (Girdi\/\u00c7\u0131kt\u0131 \u0130\u015flemleri):<\/strong> Bu metrikler, komutun ger\u00e7ekle\u015ftirdi\u011fi disk veya a\u011f G\/\u00c7 i\u015flemlerinin say\u0131s\u0131n\u0131 g\u00f6sterir. Y\u00fcksek de\u011ferler, komutun G\/\u00c7 ba\u011f\u0131ml\u0131 oldu\u011funu ve G\/\u00c7 alt sisteminin performans\u0131n\u0131 iyile\u015ftirmenin genel performans\u0131 art\u0131rabilece\u011fini d\u00fc\u015f\u00fcnd\u00fcrebilir.
\n*   Sayfa Hatalar\u0131 (%F<\/code>, %R<\/code>):<\/strong> Sayfa hatalar\u0131, bir program\u0131n bellekte olmayan bir sayfaya eri\u015fmeye \u00e7al\u0131\u015ft\u0131\u011f\u0131nda meydana gelir. Ana sayfa hatalar\u0131 (%R<\/code>), sayfan\u0131n diskten y\u00fcklenmesi gerekti\u011fi anlam\u0131na gelir ve bu pahal\u0131 bir i\u015flemdir. Y\u00fcksek ana sayfa hatalar\u0131, uygulaman\u0131n yetersiz belle\u011fe sahip oldu\u011funu veya bellek eri\u015fim desenlerinin optimize edilmedi\u011fini g\u00f6sterebilir.<\/p>\n
Pratik Kullan\u0131m Senaryolar\u0131<\/h3>\n
time<\/code> komutu, \u00e7e\u015fitli pratik senaryolarda paha bi\u00e7ilmez bilgiler sa\u011flar:<\/p>\n
1.  Betik Optimizasyonu:<\/strong> Bir kabuk beti\u011finin farkl\u0131 b\u00f6l\u00fcmlerini time<\/code> ile \u00f6l\u00e7erek, hangi komutlar\u0131n veya fonksiyonlar\u0131n beti\u011fin genel y\u00fcr\u00fctme s\u00fcresine en \u00e7ok katk\u0131da bulundu\u011funu belirleyebilirsiniz. Bu, optimizasyon \u00e7abalar\u0131n\u0131z\u0131 en etkili noktalara odaklaman\u0131za yard\u0131mc\u0131 olur.
\n2.  K\u0131yaslama ve Kar\u015f\u0131la\u015ft\u0131rma:<\/strong> \u0130ki farkl\u0131 algoritman\u0131n veya uygulaman\u0131n performans\u0131n\u0131 kar\u015f\u0131la\u015ft\u0131rmak i\u00e7in time<\/code> komutunu kullanabilirsiniz. \u00d6rne\u011fin, gzip<\/code> ile bzip2<\/code>‘nin ayn\u0131 dosyay\u0131 s\u0131k\u0131\u015ft\u0131rma s\u00fcrelerini kar\u015f\u0131la\u015ft\u0131rmak:<\/p>\n
\/usr\/bin\/time -f \"gzip: %e s, %M KB\" gzip -c buyuk_dosya.txt > \/dev\/null\n    \/usr\/bin\/time -f \"bzip2: %e s, %M KB\" bzip2 -c buyuk_dosya.txt > \/dev\/null<\/code><\/pre>\n
3.  Sistem Kaynak T\u00fcketimi Analizi:<\/strong> Uzun s\u00fcreli veya kaynak yo\u011fun bir komutun ne kadar CPU ve bellek t\u00fcketti\u011fini anlamak, sistemin genel sa\u011fl\u0131\u011f\u0131 ve kapasite planlamas\u0131 i\u00e7in \u00f6nemlidir.
\n4.  Hata Ay\u0131klama:<\/strong> Bir uygulaman\u0131n veya hizmetin beklenenden daha yava\u015f \u00e7al\u0131\u015ft\u0131\u011f\u0131 durumlarda, time<\/code> komutu, sorunun CPU mu, G\/\u00c7 mu yoksa ba\u015fka bir bekleme durumu mu oldu\u011funu h\u0131zl\u0131ca anlamak i\u00e7in ilk ad\u0131md\u0131r.
\n5.  Otomatik Test ve Raporlama:<\/strong> Betikler i\u00e7inde time -o<\/code> se\u00e7ene\u011fiyle \u00e7\u0131kt\u0131lar\u0131 dosyalara y\u00f6nlendirerek, d\u00fczenli performans testleri yapabilir ve sonu\u00e7lar\u0131 otomatik olarak toplay\u0131p analiz edebilirsiniz.<\/p>\n
S\u0131n\u0131rlamalar ve Alternatifler<\/h3>\n
time<\/code> komutu g\u00fc\u00e7l\u00fc bir ara\u00e7 olsa da, baz\u0131 s\u0131n\u0131rlamalar\u0131 vard\u0131r ve baz\u0131 durumlarda daha geli\u015fmi\u015f ara\u00e7lara ihtiya\u00e7 duyulabilir:<\/p>\n
   Yaln\u0131zca Toplam S\u00fcre:<\/strong> time<\/code> komutu, bir komutun veya s\u00fcrecin <\/em>toplam* y\u00fcr\u00fctme s\u00fcresini \u00f6l\u00e7er. Uygulaman\u0131n veya beti\u011fin i\u00e7indeki belirli fonksiyonlar\u0131n veya kod bloklar\u0131n\u0131n ne kadar s\u00fcrd\u00fc\u011f\u00fcn\u00fc \u00f6l\u00e7emez.
\n*   Sistem Y\u00fck\u00fc Etkisi:<\/strong> real<\/code> s\u00fcresi, sistemdeki di\u011fer s\u00fcre\u00e7lerin y\u00fck\u00fcnden etkilenebilir. Tutarl\u0131 sonu\u00e7lar elde etmek i\u00e7in testleri nispeten bo\u015f bir sistemde ve birden fazla kez \u00e7al\u0131\u015ft\u0131rmak \u00f6nemlidir.
\n*   K\u0131sa S\u00fcreli Komutlar:<\/strong> \u00c7ok k\u0131sa s\u00fcren komutlar i\u00e7in time<\/code> komutunun kendi ba\u015flatma ve sonland\u0131rma maliyeti (overhead) \u00f6l\u00e7\u00fclen s\u00fcreye g\u00f6re anlaml\u0131 hale gelebilir. Bu durumda, komutu bir d\u00f6ng\u00fc i\u00e7inde birden \u00e7ok kez \u00e7al\u0131\u015ft\u0131r\u0131p ortalamas\u0131n\u0131 almak daha do\u011fru sonu\u00e7lar verebilir.<\/p>\n
Daha derinlemesine performans analizi i\u00e7in a\u015fa\u011f\u0131daki ara\u00e7lar kullan\u0131labilir:<\/p>\n
*   Profilleme Ara\u00e7lar\u0131 (perf<\/code>, gprof<\/code>, oprofile<\/code>, valgrind<\/code>):<\/strong> Bu ara\u00e7lar, uygulaman\u0131n hangi fonksiyonlar\u0131n\u0131n veya kod sat\u0131rlar\u0131n\u0131n en \u00e7ok CPU s\u00fcresini t\u00fcketti\u011fini belirlemek i\u00e7in kullan\u0131l\u0131r.
\n*   Sistem \u0130zleme Ara\u00e7lar\u0131 (strace<\/code>, ltrace<\/code>):<\/strong> strace<\/code> sistem \u00e7a\u011fr\u0131lar\u0131n\u0131, ltrace<\/code> k\u00fct\u00fcphane \u00e7a\u011fr\u0131lar\u0131n\u0131 izler. Bu, bir uygulaman\u0131n ne t\u00fcr sistem etkile\u015fimleri yapt\u0131\u011f\u0131n\u0131 anlamak i\u00e7in faydal\u0131d\u0131r.
\n*   Kaynak \u0130zleme Ara\u00e7lar\u0131 (top<\/code>, htop<\/code>, vmstat<\/code>, iostat<\/code>):<\/strong> Bu ara\u00e7lar, sistemin genel CPU, bellek, disk ve a\u011f kullan\u0131m\u0131n\u0131 ger\u00e7ek zamanl\u0131 olarak izler.
\n*   Programlama Diline \u00d6zg\u00fc Ara\u00e7lar:<\/strong> Python’daki timeit<\/code> mod\u00fcl\u00fc, Java’daki JMH gibi ara\u00e7lar, programlama dillerinde belirli kod par\u00e7ac\u0131klar\u0131n\u0131 hassas bir \u015fekilde \u00f6l\u00e7mek i\u00e7in tasarlanm\u0131\u015ft\u0131r.<\/p>\n
En \u0130yi Uygulamalar<\/h3>\n
time<\/code> komutunu kullan\u0131rken daha g\u00fcvenilir ve anlaml\u0131 sonu\u00e7lar elde etmek i\u00e7in a\u015fa\u011f\u0131daki en iyi uygulamalar\u0131 g\u00f6z \u00f6n\u00fcnde bulundurun:<\/p>\n
1.  Tutarl\u0131 Ortam:<\/strong> Performans \u00f6l\u00e7\u00fcmlerini m\u00fcmk\u00fcn oldu\u011funca tutarl\u0131 bir ortamda yap\u0131n. Arka planda \u00e7al\u0131\u015fan gereksiz s\u00fcre\u00e7leri minimize edin.
\n2.  Tekrarlanan \u00c7al\u0131\u015ft\u0131rmalar:<\/strong> \u00d6zellikle k\u0131sa s\u00fcreli komutlar i\u00e7in, komutu birden \u00e7ok kez \u00e7al\u0131\u015ft\u0131r\u0131n ve sonu\u00e7lar\u0131n ortalamas\u0131n\u0131 al\u0131n. Bu, anl\u0131k sistem y\u00fck\u00fc veya di\u011fer ge\u00e7ici fakt\u00f6rlerin etkisini azalt\u0131r.
\n3.  GNU time<\/code> Kullan\u0131m\u0131:<\/strong> M\u00fcmk\u00fcnse, kabuk dahili time<\/code> yerine \/usr\/bin\/time<\/code> veya \\time<\/code> ile GNU time<\/code>‘\u0131 kullan\u0131n. Bu, daha fazla metrik ve \u00f6zelle\u015ftirme se\u00e7ene\u011fi sunar.
\n4.  Anlaml\u0131 Formatlama:<\/strong> -f<\/code> se\u00e7ene\u011fini kullanarak, ihtiyac\u0131n\u0131z olan metrikleri i\u00e7eren ve okunmas\u0131 kolay bir \u00e7\u0131kt\u0131 format\u0131 tan\u0131mlay\u0131n.
\n5.  \u00c7\u0131kt\u0131y\u0131 Dosyaya Kaydetme:<\/strong> Performans verilerini daha sonra analiz etmek veya ar\u015fivlemek i\u00e7in -o<\/code> se\u00e7ene\u011fiyle bir dosyaya kaydedin.
\n6.  Ger\u00e7ek\u00e7i Veriler:<\/strong> Komutu, \u00fcretim ortam\u0131nda kar\u015f\u0131la\u015faca\u011f\u0131 ger\u00e7ek d\u00fcnya verileriyle veya benzer boyutlardaki verilerle test edin. K\u00fc\u00e7\u00fck test verileri yan\u0131lt\u0131c\u0131 sonu\u00e7lar verebilir.
\n7.  Sistemi Anlay\u0131n:<\/strong> real<\/code>, user<\/code> ve sys<\/code> s\u00fcreleri aras\u0131ndaki ili\u015fkileri ve sisteminizin (CPU \u00e7ekirdek say\u0131s\u0131, G\/\u00c7 h\u0131z\u0131 vb.) bu de\u011ferleri nas\u0131l etkileyebilece\u011fini anlay\u0131n.<\/p>\n
Sonu\u00e7<\/h3>\n
time<\/code> komutu, Linux ve Unix benzeri sistemlerde bir komutun y\u00fcr\u00fctme s\u00fcresini \u00f6l\u00e7mek i\u00e7in basit ama g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r. real<\/code>, user<\/code> ve sys<\/code> s\u00fcreleri gibi temel metrikleri anlayarak, bir komutun performans karakteristi\u011fi hakk\u0131nda h\u0131zl\u0131ca bilgi edinebilirsiniz. GNU time<\/code>‘\u0131n sa\u011flad\u0131\u011f\u0131 geli\u015fmi\u015f formatlama, detayl\u0131 metrikler ve \u00e7\u0131kt\u0131 y\u00f6nlendirme yetenekleri, daha derinlemesine analizler yapman\u0131za olanak tan\u0131r.<\/p>\n
\u0130ster bir beti\u011fi optimize ediyor, ister farkl\u0131 ara\u00e7lar\u0131 k\u0131yasl\u0131yor, isterse de bir uygulaman\u0131n kaynak t\u00fcketimini anl\u0131yor olun, time<\/code> komutu performans analizi ara\u00e7 kutunuzdaki ilk ve en \u00f6nemli ara\u00e7lardan biridir. Onunla elde etti\u011finiz bilgiler, daha verimli sistemler ve daha h\u0131zl\u0131 uygulamalar geli\u015ftirmek i\u00e7in size yol g\u00f6sterecektir. Ancak unutmay\u0131n, time<\/code> komutu bir ba\u015flang\u0131\u00e7 noktas\u0131d\u0131r; daha karma\u015f\u0131k performans sorunlar\u0131 i\u00e7in profilleyiciler ve sistem izleme ara\u00e7lar\u0131 gibi daha uzmanla\u015fm\u0131\u015f ara\u00e7lara ba\u015fvurmak gerekebilir. Do\u011fru arac\u0131 do\u011fru zamanda kullanmak, etkili performans analizi i\u00e7in kritik \u00f6neme sahiptir.<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"time Komutu ile Komut Y\u00fcr\u00fctme S\u00fcresini Nas\u0131l \u00d6l\u00e7ersiniz?\nLinux ve di\u011fer Unix benzeri i\u015fletim sistemlerinde performans analizi ve optimizasyon","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-32619","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\ntime Komutu ile Komut Y\u00fcr\u00fctme S\u00fcresini Nas\u0131l \u00d6l\u00e7ersiniz? - Kodlar\u0131n Gizemli D\u00fcnyas\u0131<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/time-komutu-ile-komut-yurutme-suresini-nasil-olcersiniz\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"time Komutu ile Komut Y\u00fcr\u00fctme S\u00fcresini Nas\u0131l \u00d6l\u00e7ersiniz?\" \/>\n<meta property=\"og:description\" content=\"time Komutu ile Komut Y\u00fcr\u00fctme S\u00fcresini Nas\u0131l \u00d6l\u00e7ersiniz? 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