Today on work I needed searching some strings in repository. Only machine with windows was available. I am was using grep from Cygwin for this task and I am was surprised about speed of NTFS partition.I decided to repeat this task on my home Linux workstation.
[mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 3m21.262s user 0m0.914s sys 0m2.288s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m49.921s user 0m0.736s sys 0m0.957s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m1.077s user 0m0.667s sys 0m0.409s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m1.062s user 0m0.657s sys 0m0.386s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m1.020s user 0m0.641s sys 0m0.373s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m0.941s user 0m0.593s sys 0m0.335s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m0.918s user 0m0.594s sys 0m0.322s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m1.053s user 0m0.620s sys 0m0.401s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 0m1.049s user 0m0.625s sys 0m0.411s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 2m51.858s user 0m0.885s sys 0m1.863s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 3m22.615s user 0m0.876s sys 0m2.160s [mikhail@localhost ~]$ time grep -rn 'float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;' "/home/mikhail/sources/inside/Модули интерфейса/" /home/mikhail/sources/inside/Модули интерфейса/Активные продажи/Темы/Разводящая группы тем/CRMGroupTheme/CRMGroupTheme.xhtml:38: <component data-component="SBIS3.CORE.Button" name="addTheme" data-access="Работа с темами CRM" class="ws-CRMGroupTheme__addTheme" style="float:left;display: block;height: 24px;line-height: 1.2em;position: relative;text-align: center;white-space: nowrap;width: 80px;"> real 1m16.100s user 0m0.773s sys 0m1.173s [mikhail@localhost ~]$ From results we see that search goes sometimes instantly less than a second, and sometimes lasts 4 minutes. /home partition formatted in BTRFS filesystem. I would be interested investigate what is related to search speed. And make that search was always goes less than a second. Here is my mount options: UUID=82df2d84-bf54-46cb-84ba-c88e93677948 /home btrfs subvolid=5,autodefrag,noatime,space_cache,inode_cache,nodatacow 0 0 # uname -a Linux localhost.localdomain 4.2.6-301.fc23.x86_64+debug #1 SMP Fri Nov 20 22:07:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux How to start investigation? -- Best Regards, Mike Gavrilov.
