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Code optimization

- Compiler perform optimization when it is producing the assembly code.
- The optimizations are done in a structured way therefore compiler can optimize strightforward actions
- In general,
    - Optimization by code motion should be done by programmer
    - example of optimization by code motion

    for(i = 0; i < someValue; i++){
       i += callFunction(a,b);
    }
    return i;

    above code can be optimized to

    x = callFunction(a,b)

    for(i=0; i< someValue; i++){
       i += x;
    }
    return i;

    - VERY_IMPORTANT: However this can only be done when callFunction is a pure function
       - A pure function does not access or modify any global variables.
       - A pure function does not modify the input parameters(modifications to pointer)
       - Output of a pure function solely depend on the input parameters
    - The above reason is why compiler cannot do this optimization by code motion. Compiler optimization scope is limited to
    the current function scope it is compiling. Therefore compiler is unable to determine whether the callFucntion is pure or not
    - However the programmer can know this detail and perform the optimization

    - Optimization by reduction of strength will be done by compiler
    - example of reduction of strength

    - int i = j * 16 --> int i = j << 4
    - int i = j % 16 --> int i = j & 0xF

    - Multiplication/Division by power of two can be easily done bit shifting.
    - Bit shifting is a faster operation than multiplication therefore this is an optimization
    - Compiler is smart to detect these type of optimizations
    - It's better to let compiler do these type of optimization and keep the code in a more human readable form
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      • Illuminate\Cache\Events\CacheHit (186μs)
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      • Illuminate\Cache\Events\CacheHit (169μs)
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      • Illuminate\Cache\Events\CacheHit (185μs)
      • Illuminate\Cache\Events\CacheHit (337μs)
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      • Illuminate\Cache\Events\CacheHit (187μs)
      • Illuminate\Cache\Events\CacheHit (173μs)
      • Illuminate\Cache\Events\CacheHit (330μs)
      • Illuminate\Cache\Events\CacheHit (179μs)
      • Illuminate\Cache\Events\CacheHit (191μs)
      • Illuminate\Cache\Events\CacheHit (211μs)
      • Illuminate\Cache\Events\CacheHit (195μs)
      • Illuminate\Cache\Events\CacheHit (164μs)
      • Illuminate\Cache\Events\CacheHit (266μs)
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      • Illuminate\Cache\Events\CacheHit (198μs)
      • Illuminate\Cache\Events\CacheHit (214μs)
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      • Illuminate\Cache\Events\CacheHit (194μs)
      • Illuminate\Cache\Events\CacheHit (184μs)
      • Illuminate\Cache\Events\CacheHit (208μs)
      • Illuminate\Cache\Events\CacheHit (267μs)
      • Illuminate\Cache\Events\CacheHit (267μs)
      • Illuminate\Cache\Events\CacheHit (160μs)
      • Illuminate\Cache\Events\CacheHit (174μs)
      • Illuminate\Cache\Events\CacheHit (151μs)
      • Illuminate\Cache\Events\CacheHit (184μs)
      • Illuminate\Cache\Events\CacheHit (172μs)
      • Illuminate\Cache\Events\CacheHit (200μs)
      • Illuminate\Cache\Events\CacheHit (159μs)
      • Illuminate\Cache\Events\CacheHit (186μs)
      • Illuminate\Cache\Events\CacheHit (164μs)
      • Illuminate\Cache\Events\CacheHit (228μs)
      • Illuminate\Cache\Events\CacheHit (173μs)
      • Illuminate\Cache\Events\CacheHit (211μs)
      • Illuminate\Cache\Events\CacheHit (173μs)
      • Illuminate\Cache\Events\CacheHit (195μs)
      • Illuminate\Cache\Events\CacheHit (166μs)
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      • Illuminate\Cache\Events\CacheHit (185μs)
      • Illuminate\Cache\Events\CacheHit (180μs)
      • Illuminate\Cache\Events\CacheHit (256μs)
      • Illuminate\Cache\Events\CacheHit (173μs)
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      • Illuminate\Cache\Events\CacheHit (164μs)
      • Illuminate\Cache\Events\CacheHit (186μs)
      • Illuminate\Cache\Events\CacheHit (163μs)
      • Illuminate\Cache\Events\CacheHit (230μs)
      • Illuminate\Cache\Events\CacheHit (192μs)
      • Illuminate\Cache\Events\CacheHit (202μs)
      • Illuminate\Cache\Events\CacheHit (164μs)
      • Illuminate\Cache\Events\CacheHit (186μs)
      • Illuminate\Cache\Events\CacheHit (215μs)
      • Illuminate\Cache\Events\CacheHit (200μs)
      • Illuminate\Cache\Events\CacheHit (166μs)
      • Illuminate\Cache\Events\CacheHit (198μs)
      • Illuminate\Cache\Events\CacheHit (168μs)
      • Illuminate\Cache\Events\CacheHit (196μs)
      • Illuminate\Cache\Events\CacheHit (159μs)
      • Illuminate\Cache\Events\CacheHit (183μs)
      • Illuminate\Cache\Events\CacheHit (171μs)
      • Illuminate\Cache\Events\CacheHit (215μs)
      • Illuminate\Cache\Events\CacheHit (172μs)
      • Illuminate\Cache\Events\CacheHit (210μs)
      • Illuminate\Cache\Events\CacheHit (172μs)
      • Illuminate\Cache\Events\CacheHit (194μs)
      • Illuminate\Cache\Events\CacheHit (165μs)
      • Illuminate\Cache\Events\CacheMissed (258μs)
      • Illuminate\Database\Events\StatementPrepared (881μs)
      • Illuminate\Database\Events\QueryExecuted (931μs)
      • eloquent.retrieved: App\Models\SubjectCat (107μs)
      • Illuminate\Cache\Events\KeyWritten (361μs)
      • Illuminate\Cache\Events\CacheHit (1.08ms)
      • Illuminate\Cache\Events\CacheHit (264μs)
      • Illuminate\Cache\Events\CacheHit (151μs)
      • Illuminate\Cache\Events\CacheHit (142μs)
      • Illuminate\Cache\Events\CacheHit (114μs)
      • Illuminate\Cache\Events\CacheHit (128μs)
      • Illuminate\Cache\Events\CacheHit (110μs)
      • Illuminate\Cache\Events\CacheHit (135μs)
      • Illuminate\Cache\Events\CacheHit (220μs)
      • Illuminate\Cache\Events\CacheHit (187μs)
      • Illuminate\Cache\Events\CacheHit (111μs)
      • Illuminate\Cache\Events\CacheHit (118μs)
      • Illuminate\Cache\Events\CacheHit (140μs)
      • Illuminate\Cache\Events\CacheHit (129μs)
      • Illuminate\Cache\Events\CacheHit (101μs)
      • Illuminate\Cache\Events\CacheHit (117μs)
      • Illuminate\Cache\Events\CacheHit (102μs)
      • creating: site.layouts.app (391μs)
      • composing: site.layouts.app (20μs)
      • creating: components.canonical (402μs)
      • composing: components.canonical (79μs)
      • creating: components.open-graph (139μs)
      • composing: components.open-graph (49μs)
      • creating: site.headers.header (627μs)
      • composing: site.headers.header (105μs)
      • Illuminate\Cache\Events\CacheHit (1.87ms)
      • creating: components.footer (95μs)
      • composing: components.footer (115μs)
      • Illuminate\Cache\Events\CacheHit (942μs)
      • Illuminate\Cache\Events\CacheMissed (5.73ms)
      • Illuminate\Database\Events\StatementPrepared (1.02ms)
      • Illuminate\Database\Events\QueryExecuted (1.22ms)
      • eloquent.retrieved: App\Models\SubjectCat (113μs)
      • Illuminate\Cache\Events\KeyWritten (616μs)
      • Illuminate\Cache\Events\CacheHit (338μs)
      • Illuminate\Cache\Events\CacheHit (188μs)
      • Illuminate\Cache\Events\CacheHit (220μs)
      • Illuminate\Cache\Events\CacheHit (144μs)
      • Illuminate\Cache\Events\CacheHit (215μs)
      • Illuminate\Cache\Events\CacheHit (351μs)
      • Illuminate\Cache\Events\CacheHit (364μs)
      • Illuminate\Cache\Events\CacheHit (284μs)
      • Illuminate\Cache\Events\CacheHit (224μs)
      • Illuminate\Cache\Events\CacheHit (202μs)
      • Illuminate\Cache\Events\CacheHit (210μs)
      • Illuminate\Cache\Events\CacheHit (202μs)
      • creating: components.forms.contact-us (333μs)
      • composing: components.forms.contact-us (193μs)
      • creating: components.forms.get-started (416μs)
      • composing: components.forms.get-started (101μs)
      • creating: components.forms.free-tool-download (163μs)
      • composing: components.forms.free-tool-download (89μs)
      • creating: components.forms.claim-free-worksheet (151μs)
      • composing: components.forms.claim-free-worksheet (86μs)
      • creating: components.forms.tutor-subscription-waitlist (145μs)
      • composing: components.forms.tutor-subscription-waitlist (79μs)
      • creating: components.forms.tutor-subscription-join (143μs)
      • composing: components.forms.tutor-subscription-join (80μs)
      • creating: components.forms.tutor-support (144μs)
      • composing: components.forms.tutor-support (82μs)
      • 316 x Illuminate\Cache\Events\CacheHit (19.16%)
        96.22ms
        15 x Illuminate\Database\Events\QueryExecuted (11.16%)
        56.02ms
        15 x Illuminate\Database\Events\StatementPrepared (5.8%)
        29.13ms
        6 x Illuminate\Cache\Events\CacheMissed (1.33%)
        6.66ms
        6 x Illuminate\Cache\Events\KeyWritten (1.05%)
        5.25ms
        1 x Illuminate\Foundation\Events\LocaleUpdated (0.93%)
        4.68ms
        1 x creating: components.breadcrumbs (0.91%)
        4.58ms
        1 x eloquent.booting: App\Models\SubjectCat (0.4%)
        1.99ms
        1 x Illuminate\Routing\Events\Routing (0.27%)
        1.38ms
        1 x Illuminate\Database\Events\ConnectionEstablished (0.24%)
        1.21ms
        77 x eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.19%)
        932μs
        7 x eloquent.retrieved: App\Models\SubjectCat (0.15%)
        744μs
        1 x creating: site.headers.header (0.12%)
        627μs
        1 x composing: components.breadcrumbs (0.11%)
        571μs
        1 x Illuminate\Routing\Events\RouteMatched (0.11%)
        531μs
        1 x creating: components.forms.get-started (0.08%)
        416μs
        1 x creating: components.canonical (0.08%)
        402μs
        1 x creating: site.layouts.app (0.08%)
        391μs
        1 x creating: homework.show (0.08%)
        384μs
        1 x eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibrary (0.07%)
        368μs
        1 x eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibrary (0.07%)
        364μs
        1 x creating: components.forms.contact-us (0.07%)
        333μs
        7 x eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (0.05%)
        233μs
        2 x eloquent.retrieved: App\Models\Subject (0.04%)
        194μs
        1 x composing: components.forms.contact-us (0.04%)
        193μs
        1 x creating: components.forms.free-tool-download (0.03%)
        163μs
        1 x creating: components.forms.claim-free-worksheet (0.03%)
        151μs
        1 x creating: components.forms.tutor-subscription-waitlist (0.03%)
        145μs
        1 x creating: components.forms.tutor-support (0.03%)
        144μs
        1 x creating: components.forms.tutor-subscription-join (0.03%)
        143μs
        1 x creating: components.open-graph (0.03%)
        139μs
        1 x eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.02%)
        120μs
        1 x composing: components.footer (0.02%)
        115μs
        1 x composing: homework.show (0.02%)
        111μs
        1 x eloquent.booting: App\Models\Subject (0.02%)
        107μs
        1 x composing: site.headers.header (0.02%)
        105μs
        1 x composing: components.forms.get-started (0.02%)
        101μs
        1 x creating: components.footer (0.02%)
        95μs
        1 x composing: components.forms.free-tool-download (0.02%)
        89μs
        1 x composing: components.forms.claim-free-worksheet (0.02%)
        86μs
        1 x composing: components.forms.tutor-support (0.02%)
        82μs
        1 x composing: components.forms.tutor-subscription-join (0.02%)
        80μs
        1 x composing: components.forms.tutor-subscription-waitlist (0.02%)
        79μs
        1 x composing: components.canonical (0.02%)
        79μs
        1 x eloquent.booted: App\Models\SubjectCat (0.01%)
        72μs
        1 x composing: components.open-graph (0.01%)
        49μs
        1 x eloquent.booted: App\Models\Subject (0.01%)
        43μs
        1 x eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.01%)
        42μs
        1 x composing: site.layouts.app (0%)
        20μs
      14 templates were rendered
      • 1x homework.showshow.blade.phpblade
      • 1x components.breadcrumbsbreadcrumbs.blade.phpblade
      • 1x site.layouts.appapp.blade.phpblade
      • 1x components.canonicalcanonical.blade.phpblade
      • 1x components.open-graphopen-graph.blade.phpblade
      • 1x site.headers.headerheader.blade.phpblade
      • 1x components.footerfooter.blade.phpblade
      • 1x components.forms.contact-uscontact-us.blade.phpblade
      • 1x components.forms.get-startedget-started.blade.phpblade
      • 1x components.forms.free-tool-downloadfree-tool-download.blade.phpblade
      • 1x components.forms.claim-free-worksheetclaim-free-worksheet.blade.phpblade
      • 1x components.forms.tutor-subscription-waitlisttutor-subscription-waitlist.blade.phpblade
      • 1x components.forms.tutor-subscription-jointutor-subscription-join.blade.phpblade
      • 1x components.forms.tutor-supporttutor-support.blade.phpblade
      uri
      GET college-homework-library/{category}/{subject}/{id}
      middleware
      web, utm.parameters
      controller
      App\Http\Controllers\HomeworkLibraryController@show
      namespace
      where
      as
      homework.show
      file
      app/Http/Controllers/HomeworkLibraryController.php:79-176
      15 statements were executed, 4 of which were duplicates, 11 unique. Show only duplicated67.69ms
      • Connection Establishedtwenty4_siteHomeworkLibraryController.php#91
        Backtrace
        • 13. app/Http/Controllers/HomeworkLibraryController.php:91
        • 14. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 15. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 16. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `solutionslibrary` where `status` = 'published' and `price` > 0 and `solutionslibrary`.`id` = '45755' limit 1
        10.38mstwenty4_siteHomeworkLibraryController.php#97
        Bindings
        • 0: published
        • 1: 0
        • 2: 45755
        Backtrace
        • 16. app/Http/Controllers/HomeworkLibraryController.php:97
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `subjects` where `subjects`.`id` in (16)
        1.37mstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 24. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 25. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` in (45755)
        2.68mstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 24. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 25. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `subject_cats` where `subject_cats`.`id` = 3 limit 1
        1.5mstwenty4_siteHomeworkLibrary.php#201
        Bindings
        • 0: 3
        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 26. app/Http/Controllers/HomeworkLibraryController.php:105
        • 27. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 28. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 29. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
      • select * from `solutionslibrary` where `id` <> 45755 and `subject` = 16 and `status` = 'published' and `price` > 0 order by RAND() limit 6
        32.57mstwenty4_siteHomeworkLibraryRepository.php#30
        Bindings
        • 0: 45755
        • 1: 16
        • 2: published
        • 3: 0
        Backtrace
        • 14. app/Repositories/HomeworkLibraryRepository.php:30
        • 15. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 16. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 18. app/Repositories/HomeworkLibraryRepository.php:39
        • 19. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `subjects` where `subjects`.`id` in (16)
        1.45mstwenty4_siteHomeworkLibraryRepository.php#30
        Backtrace
        • 19. app/Repositories/HomeworkLibraryRepository.php:30
        • 20. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 21. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 23. app/Repositories/HomeworkLibraryRepository.php:39
        • 24. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 45755 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'question' order by `order` asc, `id` asc
        1.51mstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 45755
        • 1: question
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:58
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 45755 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'teaser' order by `order` asc, `id` asc
        2.42mstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 45755
        • 1: teaser
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:69
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 45755 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'solution' order by `order` asc, `id` asc
        3.86mstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 45755
        • 1: solution
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:80
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `subject_cats` where `subject_cats`.`id` = 3 limit 1
        3.63mstwenty4_siteHomeworkLibrary.php#201
        Bindings
        • 0: 3
        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 32. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
        • 33. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
        • 34. vendor/livewire/livewire/src/ComponentConcerns/RendersLivewireComponents.php:69
        • 35. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:70
      • select * from `subject_cats` where `subject_cats`.`id` = 11 limit 1
        1.01mstwenty4_siteSubject.php#100
        Bindings
        • 0: 11
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 5 limit 1
        960μstwenty4_siteSubject.php#100
        Bindings
        • 0: 5
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 34 limit 1
        1.76mstwenty4_siteSubject.php#100
        Bindings
        • 0: 34
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 31 limit 1
        1.21mstwenty4_siteSubject.php#100
        Bindings
        • 0: 31
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 36 limit 1
        1.38mstwenty4_siteSubject.php#100
        Bindings
        • 0: 36
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 28. view::components.footer:170
      App\Models\HomeworkLibrary\HomeworkLibraryFile
      77HomeworkLibraryFile.php
      App\Models\HomeworkLibrary\HomeworkLibrary
      7HomeworkLibrary.php
      App\Models\SubjectCat
      7SubjectCat.php
      App\Models\Subject
      2Subject.php
          _token
          EqQNcDmPjkI8SHaoF0LQkTGII7lYUBqIvHiCpjP0
          utm_source
          direct
          redirectUrl
          /college-homework-library/Computer-Science/C-Family-Programming/45755
          _previous
          array:1 [ "url" => "https://staging.dev.24houranswers.com/college-homework-library/Computer-Scienc...
          _flash
          array:2 [ "old" => [] "new" => [] ]
          PHPDEBUGBAR_STACK_DATA
          []
          path_info
          /college-homework-library/Computer-Science/C-Family-Programming/45755
          status_code
          200
          
          status_text
          OK
          format
          html
          content_type
          text/html; charset=UTF-8
          request_query
          []
          
          request_request
          []
          
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