apex/up

// Package cost provides utilities for calculating AWS Lambda pricing.
package cost

// pricePerInvoke is the cost per function invocation.
var pricePerInvoke = 0.0000002

// pricePerRequestUnit is the cost per api gateway request unit.
var pricePerRequestUnit = 5

// requestUnit is 5 million requests.
var requestUnit = 5e6

// memoryConfigurations available.
var memoryConfigurations = map[int]float64{
    128:  0.000000208,
    192:  0.000000313,
    256:  0.000000417,
    320:  0.000000521,
    384:  0.000000625,
    448:  0.000000729,
    512:  0.000000834,
    576:  0.000000938,
    640:  0.000001042,
    704:  0.000001146,
    768:  0.00000125,
    832:  0.000001354,
    896:  0.000001459,
    960:  0.000001563,
    1024: 0.000001667,
    1088: 0.000001771,
    1152: 0.000001875,
    1216: 0.00000198,
    1280: 0.000002084,
    1344: 0.000002188,
    1408: 0.000002292,
    1472: 0.000002396,
    1536: 0.000002501,
    1600: 0.000002605,
    1664: 0.000002709,
    1728: 0.000002813,
    1792: 0.000002917,
    1856: 0.000003021,
    1920: 0.000003126,
    1984: 0.000003230,
    2048: 0.000003334,
    2112: 0.000003438,
    2176: 0.000003542,
    2240: 0.000003647,
    2304: 0.000003751,
    2368: 0.000003855,
    2432: 0.000003959,
    2496: 0.000004063,
    2560: 0.000004168,
    2624: 0.000004272,
    2688: 0.000004376,
    2752: 0.000004480,
    2816: 0.000004584,
    2880: 0.000004688,
    2944: 0.000004793,
    3008: 0.000004897,
}

// Requests returns the cost for the given number of http requests.
func Requests(n int) float64 {
    return (float64(n) / float64(requestUnit)) * float64(pricePerRequestUnit)
}

// Rate returns the cost per 100ms for the given `memory` configuration in megabytes.
func Rate(memory int) float64 {
    return memoryConfigurations[memory]
}

// Invocations returns the cost of `n` requests.
func Invocations(n int) float64 {
    return pricePerInvoke * float64(n)
}

// Duration returns the cost of `ms` for the given `memory` configuration in megabytes.
func Duration(ms, memory int) float64 {
    return Rate(memory) * (float64(ms) / 100)
}