## GCN ## I mproving Go Backend Developer Experience in Grab  Chew Chee Ming Grab Engineering Manager, Developer Experience

primForce, evaluates to refl when x is in whnf. At run-time, primForce e f is compiled (by the GHC and UHC backends) to let x = e in seq x (f x). For example, consider the following function: -- pow' Foreign Function Interface ## Haskell FFI Note: This section currently only applies to the GHC backend. The FFI is controlled by five pragmas: • IMPORT • COMPILED TYPE • COMPILED DATA • COMPILED A _:_: A → List A → List A {-# COMPILED_DATA List [] [] (:) #-} ## Built-in Types The GHC backend compiles certain Agda built-ins to special Haskell types. The mapping between Agda built-in types

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edited by a staff, or a client, or maybe just you – and you don’t want to have to deal with creating backend interfaces just to manage content. One typical workflow in creating Django apps is to create models how Django will load and render templates. The default settings file configures a DjangoTemplates backend whose APP_DIRS option is set to True. By convention DjangoTemplates looks for a "templates" TEMPLATES setting: ### Listing 57: mysite/settings.py TEMPLATE = [ { 'BACKEND': 'django.template.backend.django.DjangoTemplates', 'DIRS': [os.path.join(BASE_DIR, 'templates')]

• Task result backend settings • Database backend settings • AMQP backend settings • Cache backend settings • Tokyo Tyrant backend settings • Redis backend settings • MongoDB backend settings • Messaging settings • Task execution settings • Worker: celeryd • Periodic Task Server: celerybeat • Monitor Server: celerymon • Cookbook while the user waits.| |Return Values|Task return values can be saved to the selected result store backend. You can wait for the result, retrieve it later, or ignore it.| |Result Stores|Database, MongoDB

primForce, evaluates to refl when x is in whnf. At run-time, primForce f is compiled (by the GHC and UHC backends) to let x = e in seq x (f x). For example, consider the following function: -- pow' Foreign Function Interface # Haskell FFI ## Note This section currently only applies to the GHC backend. The FFI is controlled by five pragmas: • IMPORT • COMPILED_TYPE • COMPILED DATA • COMPILED A _:_: A → List A → List A {-# COMPILED_DATA List [] [] (:) #-} ## Built-in Types The GHC backend compiles certain Agda built-ins to special Haskell types. The mapping between Agda built-in types

1156 42.44. pg_tables.....1159 42.45. pg_user.....1159 42.46. pg_views.....1160 3. Frontend/Backend Protocol.....1162 43.1. Overview.....1162 43.1.1. Messaging Overview.....1162 43.1.2. Extended File Layout ..... 1226 50.2. TOAST ..... 1227 50.3. Database Page Layout ..... 1229 51. BKI Backend Interface ..... 1233 51.1. BKI File Format ..... 1233 51.2. BKI Commands ..... 1233 51.3. Structure the instructions on supported platforms. Here “program” refers to any executable, not only the backend server. Being slow or resource-hogging is not necessarily a bug. Read the documentation or ask on

pg_timezone_names.....1269 43.50. pg_user.....1270 43.51. pg_views.....1270 **frontend/Backend Protocol**.....1272 44.1. Overview ..... 1272 44.1.1. Messaging Overview ..... 1272 44.1.2. Extended File Layout ..... 1337 52.2. TOAST ..... 1338 52.3. Database Page Layout ..... 1340 53. BKI Backend Interface ..... 1343 53.1. BKI File Format ..... 1343 53.2. BKI Commands ..... 1343 53.3. Structure the instructions on supported platforms. Here “program” refers to any executable, not only the backend server. Being slow or resource-hogging is not necessarily a bug. Read the documentation or ask on

pg_timezone_names.....1269 43.50. pg_user.....1270 43.51. pg_views.....1270 **frontend/Backend Protocol**.....1272 44.1. Overview ..... 1272 44.1.1. Messaging Overview ..... 1272 44.1.2. Extended File Layout ..... 1337 52.2. TOAST ..... 1338 52.3. Database Page Layout ..... 1340 53. BKI Backend Interface ..... 1343 53.1. BKI File Format ..... 1343 53.2. BKI Commands ..... 1343 53.3. Structure the instructions on supported platforms. Here “program” refers to any executable, not only the backend server. Being slow or resource-hogging is not necessarily a bug. Read the documentation or ask on

2167 50.81. pg_user ...2168 50.82. pg_user_mappings ...2168 50.83. pg_views ...2169 1. Frontend/Backend Protocol ...2170 51.1. Overview ...2170 51.1.1. Messaging Overview ...2170 51.1.2. Extended Map ...2322 65.5. The Initialization Fork ...2322 65.6. Database Page Layout ...2322 66. BKI Backend Interface ...2326 66.1. BKI File Format ...2326 66.2. BKI Commands ...2326 66.3. Structure of instructions on supported platforms. Here "program" refers to any executable, not only the backend process. Being slow or resource-hogging is not necessarily a bug. Read the documentation or ask